| 单词 | sulphide |
| 例句 | “Then came the famous British Museum Massacre. Two thousand culture fans gassed with dichlorethvl sulphide.” Brave New World 1932-01-01T00:00:00Z In UPM's new mill the wood is chipped, then boiled with sodium hydroxide and sodium sulphide at high pressure. Does the paper industry need to cut its water usage? 2023-10-22T04:00:00Z Smit conducted the isotope analyses of sulphide inclusions at Carnegie Institution for Science. Ancient diamonds shine light on the evolution of Earth 2023-10-18T04:00:00Z The following week an anti-suffragette counter-protest used a motor horn and noxious hydrogen sulphide gas to try and disrupt the speakers. 'No peace' - the plot to burn down Wimbledon 2023-07-03T04:00:00Z His mother, Rebecca Currie is convinced her son's underlying health problems have been made worse by emissions of hydrogen sulphide gas coming from the landfill. Silverdale Walleys Quarry landfill continues to prompt complaints 2023-05-22T04:00:00Z It suffocates resident wildlife, and the toxic gases it releases - hydrogen sulphide and ammonia - can cause headaches, nausea and breathing difficulties in humans. 'We are selling a product that we hope gets discontinued' 2023-05-17T04:00:00Z In addition to simple ices such as water, carbon dioxide, carbon monoxide, ammonia, and methane, Webb sees several other compounds, including carbonyl sulphide and the more complex organic ice methanol. Webb telescope hunts life's icy chemical origins 2023-01-24T05:00:00Z BHP, through its Nickel West unit, has the second largest nickel sulphide resource base globally, and has plans to increase its spending on nickel exploration over the next two years. BHP sees Australia benefiting from EV metals push in U.S., Europe 2022-11-02T04:00:00Z The miner said it has the second largest nickel sulphide resource base globally, based on its land holding, totalling 120,000 hectares, in the Agnew-Wiluna belt in Western Australia. BHP to boost nickel exploration spending amid EV boom 2022-08-03T04:00:00Z Lawyers successfully argued at the High Court that hydrogen sulphide gas had worsened the seven-year-old's underlying health issues, and that emissions were affecting hundreds and probably thousands of local people. Silverdale Walleys Quarry landfill continues to prompt complaints 2023-05-22T04:00:00Z Other sulphide minerals are commonly present within the ore, especially pyrite. Physical Geology 2015-01-01T00:00:00Z The company put its zinc sulphide operation in Italy on care and maintenance until there is “a meaningful change in power market prices”. Glencore sets aside $1.5 billion for probes, reports record earnings 2022-02-15T05:00:00Z Traces of the mineral galena - lead sulphide - a substance that was crushed and mixed with oil as make-up, was found on the site, archaeologists said. HS2: Vast Roman settlement found by archaeologists 2022-01-11T05:00:00Z Hydrogen sulphide is a poisonous, corrosive gas with an eggy smell. Silverdale stink: The landfill smell uniting a community in anger 2021-05-01T04:00:00Z No appeal was made against the original finding that Mathew's health issues had been exacerbated by hydrogen sulphide. Silverdale Walleys Quarry landfill continues to prompt complaints 2023-05-22T04:00:00Z All magmas have varying proportions of elements such as hydrogen, carbon, and sulphur, which are converted into gases like water vapour, carbon dioxide, and hydrogen sulphide as the magma cools. Physical Geology 2015-01-01T00:00:00Z In 2013, three people were killed and two injured in a hydrogen sulphide poisoning incident at the mine, it added. Coal mine accident in China's Chongqing kills 18 2020-12-05T05:00:00Z But 30 days later, one band of mud had become paler, suggesting some hydrogen sulphide had gone missing. ‘Electric mud’ teems with new, mysterious bacteria 2020-08-19T04:00:00Z Given Tesla’s focus on sustainability, the company is likely to prefer to buy from miners of higher-grade nickel sulphide, which requires less power to process than laterite ore, said Lachlan Shaw of National Australia Bank. 'Please mine more nickel,' Musk urges as Tesla boosts production 2020-07-23T04:00:00Z In March, this year the Environment Agency said conditions at Walleys Quarry had improved and hydrogen sulphide levels on the site are now less than a quarter of what they were in 2021. Silverdale Walleys Quarry landfill continues to prompt complaints 2023-05-22T04:00:00Z These include oxides, sulphides, carbonates, silicates, and others. Physical Geology 2015-01-01T00:00:00Z In early 20th-century paint production, cadmium sulphide was produced at times through a reaction between cadmium chloride and sodium sulfide. Human breath taking its toll on Munch's The Scream, say scientists 2020-05-18T04:00:00Z Despite the high levels of metals and sulphides present, the sites are teeming with life. Hippos, haloes and black holes — April’s best science images 2019-05-02T04:00:00Z Hydrogen sulphide in the town's air was at least 10 times above the permitted level on Thursday, although locals said it was far worse than that. Russian emergency as toxic fumes hit town 2018-03-30T04:00:00Z Residents living near the site say hydrogen sulphide levels are affecting their health. Silverdale Walleys Quarry landfill continues to prompt complaints 2023-05-22T04:00:00Z Police said that when the bomb plot failed, the two suspects started on a second plot which involved creating an improvised chemical device designed to release hydrogen sulphide, or "rotten egg gas". Israel foiled Australia 'plane terror plot' 2018-02-21T05:00:00Z Aoxing Petrochemical in Dongying was ordered to close for an unspecified period after a leak of hydrogen sulphide in early August killed two people, according to local government reports. China's war on smog chokes Shandong industries, smokes out fuel kiosks 2017-09-13T04:00:00Z "We are now looking for more benign light absorbers than cadmium sulphide to provide bacteria with energy from light." 'Cyborg' bacteria deliver green fuel source from sunlight - BBC News 2017-08-22T04:00:00Z The second alleged plan involved creating an improvised chemical device that was designed to release toxic hydrogen sulphide. Australia terror probe: Plane suspects 'made two plots' - BBC News 2017-08-03T04:00:00Z When waste breaks down, it can produce a gas called hydrogen sulphide which smells like rotten eggs. Silverdale Walleys Quarry landfill continues to prompt complaints 2023-05-22T04:00:00Z The draft National Environmental Quality Standards for Air propose maintaining the maximum legal limits for nitrogen dioxide, carbon monoxide, hydrogen sulphide, lead and benzene, but doubling the limit for some particulate matter. Peru's plans to cut air quality rules would smooth sale of top polluter 2017-05-01T04:00:00Z Aoxing Petrochemical in Dongying was ordered to close for an unspecified period after a leak of hydrogen sulphide in early August killed two people, according to local government reports. China's war on smog chokes Shandong industries, smokes out fuel kiosks 2017-09-13T04:00:00Z "We grow them and we introduce a small amount of cadmium, and naturally they produce cadmium sulphide crystals which then agglomerate on the outsides of their bodies." 'Cyborg' bacteria deliver green fuel source from sunlight - BBC News 2017-08-22T04:00:00Z The sensors will gather real-time data about Masaya’s temperature, atmospheric pressure, gravity, and the variety of different gasses like carbon dioxide and hydrogen sulphide. This volcano in Nicaragua is going to be connected to the internet 2016-08-03T04:00:00Z The company is also burying hydrogen sulphide - another byproduct from the plant. Experiment 'turns waste CO2 to stone' - BBC News 2016-06-09T04:00:00Z He performed the then standard test of passing hydrogen sulphide through the suspect fluid, which produced a distinctive yellow precipitate indicating arsenic. Sex, lies and arsenic: how the 'king of poisons' lost its crown 2015-12-22T05:00:00Z The build up of ammonia and hydrogen sulphide gases is recognised as a potentially lethal hazard when dealing with fish. Revealed: trafficked migrant workers abused in Irish fishing industry 2015-11-02T05:00:00Z Dimethyl sulphide is a molecule we’ve all smelt, it is part of the sulphur cycle and is responsible for the “smell of the seaside”. The Secret of the World's Smelliest Flower 2015-07-14T04:00:00Z More specifically, it investigates a recent theoretical prediction by a group of Chinese physicists that hydrogen sulphide should remain superconducting up to about 80 K when exposed to a pressure of 1.6 million atmospheres. Superconductivity Record Broken with Rotten-Egg Smelling Compound 2014-12-15T05:00:00Z As well as its tourist-friendly natural beauty, the area's volcanic and limestone geology also provided the perfect conditions for mineralising the lead sulphide ore called galena. The fatal attraction of lead 2014-10-11T04:00:00Z Massive sulphide deposits form around deep sea vents that spurt super hot, acidic water with metals dissolved from the earth's crust. New Zealand may kick start race to mine the ocean floor 2014-06-15T04:00:00Z Pretty well all sewage smells of hydrogen sulphide, though, so for it to be a useful telltale you need to know just how much is a sign of trouble. It’s a gas 2014-06-12T04:00:00Z Manufacturers also prefer linings that block sulphur compounds — found in proteins, preservatives and pesticides — from reacting with the metal and forming unattractive iron or tin sulphide stains. Toxicology: The plastics puzzle 2014-04-16T17:21:06.648Z The natural gas contains a high level of hydrogen sulphide. Chevron's $6.4 bln China gas project pushed back again-sources 2013-12-06T08:28:19Z These tiny plants would in turn release more of the chemical dimethyl sulphide that seeds clouds to reflect sunlight. Plants Slow Climate Change by Forming Cloud Sunshade 2013-04-29T17:45:05.640Z On Tuesday, state pathologist Prof Jack Crane said the levels of hydrogen sulphide and other toxic gases were high enough to render the men unconscious. Farm tragedy 'worst in 20 years' 2013-01-29T13:20:24Z These impoverished ecosystems, moreover, are dominated by Acidithiobacillus, one of the sorts of bug that turn hydrogen sulphide into sulphuric acid. It’s a gas 2014-06-12T04:00:00Z The company claims to be the first to properly explore the ocean floor for sulphide systems as a potential source of gold, zinc, copper and silver. Prospects for underwater goldmine in Pacific decline 2013-01-01T17:08:32Z It's also high-pressure and rich in combustible hydrogen sulphide. Energy giants look to longer term at Kazakh field 2012-10-22T10:29:41Z This quickly degrades into another chemical, dimethyl sulphide, which generations of those subjected to unimaginative school lunches will instantly recognise. Marine biology: Scents and sensibility 2012-09-27T15:09:28Z The most poisonous is hydrogen sulphide which is produced in large amounts in a slurry tank. Community shock at farm deaths 2012-09-17T15:56:46Z Hydrogen sulphide levels in the most corroded pipes were above 100 parts per million—putting a number on what was previously just a reasonable assumption that more hydrogen sulphide is worse. It’s a gas 2014-06-12T04:00:00Z The gases generated include methane, carbon dioxide, ammonia and hydrogen sulphide. The lethal risks of slurry tanks 2012-09-17T11:30:22Z Here an n-type semiconductor, such as cadmium sulphide, forms a depletion region when in contact with the p-type absorber. Materials interface engineering for solution-processed photovoltaics 2012-08-15T17:22:03.163Z The factory workers used to color the dials with glow-in-the-dark paint made from radium powder and zinc sulphide. France's 20th century radium craze still haunts Paris 2012-07-19T07:56:39Z If originally derived from a sulphide, none of this seems to remain. Mohave Pottery 2012-04-26T02:00:09.420Z Of all bodies so far tried, sulphide of zinc seems to be the most susceptible to phosphorescence. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z It also advises that pocket-sized meters are available to measure the levels of hydrogen sulphide gas. The lethal risks of slurry tanks 2012-09-17T11:30:22Z Efforts to replace cadmium sulphide with a buffer that contains no heavy metals must take into account the effect of conduction-band offset on device performance. Materials interface engineering for solution-processed photovoltaics 2012-08-15T17:22:03.163Z A salt of the class formed by the combination of an acid and a base, or by the union of two oxides, two sulphides, selenides, or tellurides, as distinguished from a haloid compound. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z It is a zinc sulphide, but often contains some iron. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z One of the defects of this sulphide is, that it loses its quality of emitting light when brought to a temperature which is by no means high. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z "In particular, hydrogen sulphide is extremely poisonous to people and animals," the leaflet states. The lethal risks of slurry tanks 2012-09-17T11:30:22Z When mercurials have been taken sulphide of mercury may give a green color to the discharges. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z It may be added that sulphur is also successfully employed in the form of an alkaline sulphide, such as solution of “liver of sulphur,” a variety of potassium sulphide. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z It is a sulphide of antimony, lead, and copper. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z Prof Chris Mason, a specialist in regenerative medicine at University College London, said: "It would be interesting to see how hydrogen sulphide works with other cells types." Bad breath used as stem cell tool 2012-02-27T05:06:53Z The gold replaces the reduced silver and sulphide of silver. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z Cuprite occurs in the upper part of copper-bearing lodes, and is of secondary origin, having been produced by the alteration of copper sulphides. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z It is true, the water extracts a little alkali, and a trace of sulphide of sodium; but the abstraction of these bodies is hardly sufficient to account for the change in question. Donahoe's Magazine, Volume XV, No. 3 Volume XV (Jan 1886-Jul 1886) 2012-01-23T03:00:12.223Z A double sulphide of antimony and iron, of a dark steelÏgray color. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z Small amounts of hydrogen sulphide are made by the body. Bad breath used as stem cell tool 2012-02-27T05:06:53Z Cobaltite, smaltite and other sulphides and sulpharsenides of the pyrites group of minerals crystallize in these forms. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Goldbrook is engaged in the exploration and development of nickel, copper, platinum sulphide deposits. Goldbrook Ventures' says Chinese partner to make C$100 mln offer 2012-01-20T17:29:54Z A new test for chloral hydrate has been devised by Frank Ogston, namely, yellow sulphide of ammonium. Scientific American, Vol. XLIII.?No. 1. [New Series.], July 3, 1880 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:30.823Z A mineral of a bluish gray color and metallic luster, usually in plumose masses, also compact.It is sulphide of antimony and lead. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z Its reactions with the metallic salts are similar to those of the alkaline sulphides. Scientific American, Vol. XXXVII.?No. 2. [New Series.], July 14, 1877 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:29.743Z The use of copper or brass tubes should be strictly avoided, as they would be quickly corroded by the action of the ammonia and hydrogen sulphide contained in the gas. Gas-Engines and Producer-Gas Plants A Practice Treatise Setting Forth the Principles of Gas-Engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-Gas Engines and Their Possibilities, the Care of Gas-Engines and Producer-Gas Plants, with a Chapter on Volatile Hydrocarbon and Oil Engines 2011-12-28T03:00:31.087Z The potassium sulphide is also the most objectionable constituent as regards fouling. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" 2011-12-16T03:00:12.320Z This, as well as lead ash, was also an artificial lead sulphide. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Bell metal ore, a sulphide of tin, copper, and iron; the mineral stannite. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z If into this solution be introduced and heated any organic which contains sulphur, like hair, feathers, horn, albumen, and the like, it will at once turn black from the formation of sulphide of lead. Scientific American, Vol. XXXVII.?No. 2. [New Series.], July 14, 1877 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:29.743Z The chemical action has for its chief object to rid the gas of the carbonic acid and the hydrogen sulphide which certain fuels give off in appreciable amounts. Gas-Engines and Producer-Gas Plants A Practice Treatise Setting Forth the Principles of Gas-Engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-Gas Engines and Their Possibilities, the Care of Gas-Engines and Producer-Gas Plants, with a Chapter on Volatile Hydrocarbon and Oil Engines 2011-12-28T03:00:31.087Z These are the only certain examples of natural combinations of the metal, the minute, though economically valuable, quantity often found in pyrites and other sulphides being probably only present in mechanical suspension. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Dioscorides and Pliny mention substances which were evidently copper sulphides, but no description occurs prior to Agricola that permits a hazard as to different species. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Bengal′-light, a brilliant signal-light used at sea in a case of shipwreck, and in ordinary pyrotechny for illuminating a district of country—prepared from nitre, sulphur, and the black sulphide of antimony. Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) 2011-10-11T02:01:08.990Z Two oxides of germanium are known, the dioxide, GeO2, being obtained by roasting the sulphide and treatment with nitric acid. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 7 "Geoponici" to "Germany" 2011-09-26T02:00:25.313Z Then he treats the brimstone with various solvents, and finds that, while insoluble in water or alcohol, it dissolves readily in sulphide of carbon. Scientific Culture, and Other Essays Second Edition; with Additions 2011-09-17T02:00:31.747Z Aurous sulphide, Au2S, is a brownish-black powder formed by passing sulphuretted hydrogen into a solution of potassium aurocyanide and then acidifying. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z The smelted antimony of commerce sold under the latter term was the sulphide. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z View of Zinc Oxide Fume Pipes with electrically driven Suction Fans The color of the pigment is largely due to the carbon and the lead sulphide. Paint Technology and Tests 2011-09-15T02:00:12.263Z It is appreciably soluble in water, and also in solutions of the caustic alkalis and alkaline sulphides. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 7 "Geoponici" to "Germany" 2011-09-26T02:00:25.313Z The action of oxide of iron, which has now partly replaced the lime purification, depends on its power of combining with sulphuretted hydrogen to form sulphide of iron. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z The conversion of silver into the sulphide may be effected by heating with antimony sulphide, litharge and sulphur, pyrites, or with sulphur alone. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z This, considering his localities, would indicate the sulphide, although he assigns no special name to it. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Lithopone, probably the whitest of pigments, results from the double decomposition of zinc sulphate and barium sulphide, thereby forming a molecular combination of zinc sulphide and barium sulphate. Paint Technology and Tests 2011-09-15T02:00:12.263Z Cold fumaroles, below 100�, discharge principally aqueous vapour, with carbon dioxide, and perhaps hydrogen sulphide. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z In the second box the formation of calcium thiocarbonate takes place by the action of carbon disulphide upon the calcium sulphide with the liberation of sulphuretted hydrogen, which is carried over to the third purifier. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z Gold forms three sulphides corresponding to the oxides; they readily decompose on heating. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z So much was this the case later on, that Henckel, the leading mineralogist of the 18th Century, entitled his large volume Pyritologia, and in it embraces practically all the sulphide minerals then known. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Lead pigments are never used with lithopone, as lead sulphide results, giving a black appearance. Paint Technology and Tests 2011-09-15T02:00:12.263Z Such calciners are used especially in roasting zinc blende into zinc oxide, and in the conversion of copper sulphides into chlorides in the wet extraction process. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z It’s after it rots in the sun that gases such as hydrogen sulphide and ammonia form under the crust. ‘Green Tides’ Drive Tourists From Brittany 2011-08-04T10:42:21Z Sodium aurosulphide, NaAuS�4H2O, is prepared by fusing gold with sodium sulphide and sulphur, the melt being extracted with water, filtered in an atmosphere of nitrogen, and evaporated in a vacuum over sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Apparently roasting, as a preliminary to the treatment of copper sulphides, did not come into use in England until some time later than Agricola, for in Col. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z It is very apparent that the Pittsburg panels are much the darker in color, due to the soot, and in some cases lead sulphide formed upon their surfaces. Paint Technology and Tests 2011-09-15T02:00:12.263Z Local police official Philippe De Gestas said they were doing autopsies on some of the carcasses, as well as testing for hydrogen sulphide, a poisonous gas given off by the algae as they decompose. Boars found dead on French coast 2011-07-28T11:56:45Z In admixture with sulphur, sulphides and especially phosphorus, chlorates give extremely sensitive compositions, some of which form the basis of friction tube and firing mixtures. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z Sulphuretted hydrogen, obtained by treating iron sulphide or a coarse matte with dilute sulphuric acid, is forced in similarly. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z At this time sulphide copper and lead ores were smelted; but as to fluxes, except lead for silver, and lead and soda for gold, we have practically no mention. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The main element in the change is the production of hydrogen sulphide. Psychotherapy 2011-06-19T02:00:20.053Z Where there is much sulphide in the ore the gold must be extracted by the hydro-electric process.” Ruth Fielding In the Saddle College Girls in the Land of Gold 2011-06-14T02:00:22.083Z He noted that the potters applied “the galena native sulphide of lead for the glaze, no doubt originally dusted on to the ware, as with the older potters elsewhere.” North Devon Pottery and Its Export to America in the 17th Century 2011-05-14T02:00:10.023Z The gold is precipitated as the sulphide, together with any arsenic, antimony, copper, silver and lead which may be present. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Later than Agricola these methods of parting bullion by converting the silver into a sulphide and carrying it off in a regulus took other forms. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The minerals containing lead are principally galenite or lead sulphate, cerussite or lead carbonate; while the zinc is contained in the minerals, sphalerite or zinc sulphide, calamine or zinc silicate, smithsonite or zinc carbonate, etc. North America 2011-05-05T02:00:20.027Z She knew also that hydrogen sulphide leaked from an explosion at a PetroChina exploration well in 2004 in Chongqing, killing hundreds of villagers in their sleep. Special Report: China set to unearth shale power 2011-04-20T15:31:52Z In addition, there usually is present some very easily ignited substance like sulphur or sulphides, or phosphorus or phosphides, &c. The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar 2011-04-14T02:00:59.373Z The Houssa captain was making palatable medicine with the aid of a book of cigarette papers and a six-ounce bottle of quinine sulphide. Sanders of the River 2011-03-12T03:00:26.427Z It is very difficult to say when roasting began as a distinct and separate metallurgical step in sulphide ore treatment. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The most obvious hint of risk, though, is the smell of rotten eggs around the central processing facility, which indicates the presence of toxic hydrogen sulphide gas. Special Report: Risk, reward and Kurdistani oil 2011-03-10T10:41:16Z The energy company was drilling for "sweet" gas, which does not contain deadly levels of hydrogen sulphide, Husky Energy spokesman Graham White told Reuters news agency. Canada gas well blast injures 11 2011-03-08T02:43:01Z Then give sulphide of mercury, 3 grains, two or three times on alternate nights. Our Cats and All About Them Their Varieties, Habits, and Management; and for Show, the Standard of Excellence and Beauty; Described and Pictured 2011-03-03T03:00:48.597Z Iron pyrites.—This is a sulphide of iron of very common occurrence. Geology 2011-02-20T03:00:12.660Z Orpiment and realgar are the yellow and red arsenical sulphides. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Hydrogen sulphide is not the only bad smell to emanate from Kurdish oil. Special Report: Risk, reward and Kurdistani oil 2011-03-10T10:41:16Z The strikingly different effects of the sulphates and sulphides are due to similar conditions, as also of many other compounds. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Electrolytes possess the power of coagulating solutions of colloids such as albumen and arsenious sulphide. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The sulphide colours are remarkable for their fastness to light, alkalis, acids and washing, but unless proper care is exercised the cotton is apt to be tendered on being stored for some time. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Professor W. A. Carlyle informs us that the ore worked must have been almost exclusively sulphides, as only negligible quantities of carbonates exist in the deposits; they probably mixed basic and siliceous ores. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Researchers were also surprised to find compounds such as hydrogen sulphide, which are the result of a chemical reaction. Moon Not Only Has Water, but Lots of It 2010-10-21T19:37:00Z Harold said Panoramic would exclude Norilsk's Cawse nickel operation from any future purchase, due to a reliance on alternative laterite ores to the more conventional sulphide ores the company already mines. Panoramic eyes Norilsk's Australian mines: CEO 2010-08-04T12:37:00Z Strzhalkovsky said at an investor day in London last week that it was possible the company would keep its sulphides operations and sell off its laterites. UPDATE 1-Norilsk CEO says may sell off Stillwater stake 2010-05-24T12:30:00Z The dyestuff Cachou de Laval, discovered in 1873, was the first member of this group, and was obtained by melting a mixture of sodium sulphide and various organic substances—e.g. bran, sawdust, &c. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z The copper would require 4.5 parts of sulphur to convert it into sulphide, and the silver about 7 parts, or a total of 11.5 parts required against 9 parts furnished. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z They feed on hydrogen sulphide in oxygen-starved waters in a band off Peru and Chile. Microbes galore in seas; "spaghetti" mats Pacific 2010-04-18T17:09:00Z He explained: "The site that they mine, they're going to destroy all these vent chimneys where the sulphide fluids come out." Deepest volcanic vents discovered 2010-04-12T09:21:00Z This method is modified in practice by the character of the ores, carbonates and silicates free from sulphides being decomposed by hydrochloric acid, with the addition of a little nitric acid. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" The oxide known as white arsenic is mentioned by the Greek alchemist Olympiodorus, who obtained it by roasting arsenic sulphide. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" The use of antimony sulphide to part silver from gold is based upon the greater affinity of silver than antimony for sulphur. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Ar�gentite, sulphide of silver, a blackish or lead-grey mineral, a valuable ore of silver found in the crystalline rocks of many countries. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli The amorphous variety may be obtained from the crystalline form by dissolving it in caustic potash or soda or in solutions of alkaline sulphides, and precipitating the hot solution by dilute sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Zinc.—Chemically the ores of zinc consist of the silicates, carbonates, oxides, and sulphides of zinc associated with other metals, some of which complicate the methods of assay. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Arsenic is found in the uncombined condition in various localities, but more generally in combination with other metals and sulphur, in the form of more or less complex sulphides. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" Thus the silver, as in the last process, is converted into a sulphide, and is absorbed in the regulus, while the metallic antimony alloys with the gold and settles to the bottom of the pot. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Combined with sulphur it forms orpiment and realgar, which are the yellow and red sulphides of arsenic. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli Antimony, in the form of its sulphide, has been known from very early times, more especially in Eastern countries, reference to it being made in the Old Testament. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Iron pyrites, sulphide of iron in crystalline form, was formerly collected on the Sandown shore, and sent to London for the manufacture of sulphuric acid. The Geological Story of the Isle of Wight Arsenic is usually estimated either in the form of magnesium pyroarsenate or as arsenic sulphide. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" In any event, if the powder was introduced into the molten bullion, the effect would be to form some silver sulphides in a regulus of different composition depending upon the varied ingredients of different compounds. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The above considerations apply equally to the chlorides and chlorates, the iodides and iodates, the sulphides and sulphates, and in general to all chemical salts. The Mechanism of Life For rich ores the method of roasting the sulphide with metallic iron is sometimes employed; carbon and salt or sodium sulphate being used to slag the iron. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The substance is usually optically isotropic, though sometimes it exhibits anomalous double refraction; fibrous zinc sulphide which is doubly refracting is to be referred to the hexagonal species wurtzite. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" By this method of distillation the arsenic sublimes into the receiver, leaving a residue of iron sulphide in the retort. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" All the old refiners varied the process by using mixtures of salt, antimony sulphide, and sulphur, in different proportions, with and without lead or copper; the net effect was the same. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Sublimations are generally oxides, chlorides and sulphates, sometimes sulphides. The Eruption of Vesuvius in 1872 By the union of antimony trisulphide with basic sulphides, livers of antimony are obtained. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The mineral is also frequently found massive, with a coarse or fine granular structure and a crystalline fracture; sometimes it occurs as a soft, white, amorphous deposit resembling artificially precipitated zinc sulphide. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" In the sulphide method, the arsenic should be in the arsenious form. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" In order to reduce the sulphides the ancient smelters apparently depended upon partial roasting in the furnace at a preliminary period in reduction, or else upon the ferruginous character of the ore, or upon both. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The lustre pigments, a mixture of sulphide of copper or sulphide of silver, or both with red ochre or other earth, was then painted over the glazed surface with vinegar as a medium. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" That aniline could be obtained by the reduction of nitrobenzene was shown by Zinin in 1842, who used sulphide of ammonium for reducing the nitrobenzene, and named the resulting base “benzidam.” Coal and What We Get from It In these cases the zinc sulphide has probably arisen from the reduction of sulphate by organic matter. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" Potassium, when heated, burns in the vapour of carbon bisulphide, forming potassium sulphide and liberating carbon. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" The use of sulphur or antimony sulphide would tend to part out a certain amount of silver, and thus obtain fairly pure bullion upon cupellation. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The stools are dark green, containing calomel, mercuric sulphide and bile which, owing to the antiseptic action, has not been decomposed. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" Sulphides.—Many sulphides, when heated in an ignition tube, volatilize and give a sublimate of sulphur in combination with the metallic portion of the substance. The Elements of Blowpipe Analysis BLENDE, or Sphalerite, a naturally occurring zinc sulphide, ZnS, and an important ore of zinc. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" He has tried the action of such acids as citric, tartaric, oxalic, acetic, malic, and other acids, on finely powdered carbonates, silicates, sulphides, and other classes of mineral. The Galaxy, April, 1877 Vol. XXIII.—April, 1877.—No. 4. Originally the "antimony" of trade was the sulphide. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z In union with iron it forms sulphide of iron. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Heated in an ignition tube it first yields a red sublimate of sulphide of arsenic, and then afterward a crystalline sublimate of metallic arsenic. The Elements of Blowpipe Analysis The blackish brown sulphide precipitated from bismuth salts by sulphuretted hydrogen is insoluble in ammonium sulphide, but is readily dissolved by nitric acid. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" Grinning maliciously, David took down a bottle from the shelf of chemicals, poured a colorless liquid into a beaker, and walked casually toward the doorway as he agitated the mixture of hydrogen sulphide and mercaptans. Category Phoenix Later, with the application of that term to the metal, the sulphide was termed "grey antimony," and we have either used stibium for lack of better alternative, or adopted "grey antimony." De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Crystals are very rare, the mineral being usually found as compact and earthy masses or as a blue coating on other copper sulphides. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" In an ignition tube it yields on continued heating a sublimate of antimony sulphide. The Elements of Blowpipe Analysis In quantitative estimations it is generally weighed as oxide, after precipitation as sulphide or carbonate, or in the metallic form, reduced as above. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" Other phosphorescent substances, such as barium platino-cyanide, may be substituted for the zinc sulphide, but they do not answer so well. A Brief Account of Radio-activity The method described by Agricola for treating antimony sulphide is still used in the Harz, in Bohemia, and elsewhere. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The ores of any economic importance contain the copper either as oxide, carbonate, sulphate or sulphide. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Phosphorescent substances, such as calcium sulphide show this effect, as also do various specimens of fluor-spar. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" It colours the faeces black owing to the formation of sulphide. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" This is due to the bombardment of the zinc sulphide by a type of ray called the alpha ray. A Brief Account of Radio-activity The resulting purified antimony sulphide is the modern commercial "crude antimony" or "grey antimony." De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The conversion of the sulphide into oxide is adopted where the Douglas-Hunt process is employed, or where hydrochloric or sulphuric acids are cheap. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" It will be seen from the details given above that concretions may be calcareous, siliceous, argillaceous and phosphatic, and they may consist of carbonate or sulphide of iron. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7 "Columbus" to "Condottiere" The priming is not only combustible but also a conductor of electricity, such as an intimate mixture of potassium chlorate with copper sulphide and phosphide. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" A zinc sulphide screen is fixed in one end of a small tube and a plate carrying a trace of radium is placed very close to it. A Brief Account of Radio-activity The sulphides, oxides, etc., could not be obtained without fusing in a furnace with appropriate de-sulphurizing or reducing agents, to which Agricola dimly refers. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Many attempts have been made to use crude sulphide of copper or matte as an anode, and recover the copper at the cathode, the sulphur and other insoluble constituents being left at the anode. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Ammonium sulphide, added to the filtered fluids, threw down from that which contained the cream of tartar a sensible amount of dark mercurial sulphide, while that which contained pure water gave no notable reaction. The History of the Medical Department of Transylvania University A certain amount of bismuth sulphate is always formed during the calcination; this is subsequently reduced to the sulphide and ultimately to the metal in the fusion. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" By the scintillations on a zinc sulphide screen. A Brief Account of Radio-activity Further, we may say at once that there is not, so far as has yet been found, even a remote statement that could be applied to the sulphide processes. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z According to Herbert Lang, its most prominent chance of success is in localities where fuel is dear, and the ores contain precious metals and sufficient sulphides and arsenides to render profitable dressing unnecessary. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Cobalt chloride, CoCl2, in the anhydrous state, is formed by burning the metal in chlorine or by heating the sulphide in a current of the same gas. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" A dry method of purification consists in a liquation on a hearth of peculiar construction, which occasions the separation of the unreduced bismuth sulphide and the bulk of the other impurities. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" On introducing the emanation into the tube, the escape of the alpha particles from the emanation was clearly seen by the scintillations produced at some distance on a zinc sulphide screen. A Brief Account of Radio-activity It is difficult to believe such a combination was other than iron sulphide, but it is equally difficult to understand how it was serviceable for this purpose. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Other precipitants such as sulphuretted hydrogen and solutions of sulphides, which precipitate the copper as sulphides, and milk of lime, which gives copper oxides, have not met with commercial success. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Cobalt salts may be readily detected by the formation of the black sulphide, in alkaline solution, and by the blue colour they produce when fused with borax. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" But it’s very curious that the day before the torchship left exactly one hundred and forty-four cylinders of hydrogen sulphide were missing from quartermaster stores. Political Application Metacinnabarite is a cubic form of mercuric sulphide, this compound being dimorphous. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" The added iron and copper would also combine with the sulphur from the antimony sulphide, and no doubt assist by increasing the amount of free collecting agent and by increasing the volume of the matte. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Also, however slowly the calcination may be conducted, there is always more or less copper sulphide left unchanged, and some copper oxide formed. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Chromic sulphide, Cr2S3, results on heating chromium and sulphur or on strongly heating the trioxide in a current of sulphuretted hydrogen; it forms a dark green crystalline powder, and on ignition gives the sesquioxide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" This is more particularly the case in regard to sulphide ores containing very friable constituents carrying silver. Twentieth Century Inventions A Forecast Mercuric oxide, sulphide and iodide; arsenic trioxide; titanium dioxide and silicon dioxide may be cited as examples. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" We first find mention of parting with sulphur in the 12th century, with nitric acid prior to the 14th century, by antimony sulphide prior to the 15th century, and by cementation with nitre by Agricola. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Calcination with ferrous sulphate converts all the copper sulphide into sulphate. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Though it looks to me like a surface deposit of sulphide.' Miss Cayley's Adventures The stuff might absorb sunlight, like barium sulphide. Astounding Stories, April, 1931 Sulphur dioxide, recognized by its smell and acid reaction, results from the ignition of certain sulphites, sulphates, or a mixture of a sulphate with a sulphide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Gold parted from silver with antimony sulphide Prior to 1500 A.D. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The conversion of copper sulphide into the chlorides may be accomplished by calcining with common salt, or by treating the ores with ferrous chloride and hydrochloric acid or with ferric chloride. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" As I anticipated, the brooch had grown black on the surface with a thin iridescent layer of silver sulphide, while the franc had hardly suffered at all from the exposure. Miss Cayley's Adventures This oil is a compound of sulphur, carbon, and hydrogen, and is called sulphide of allyl, because of its origin in the allium tribe. Storyology Essays in Folk-Lore, Sea-Lore, and Plant-Lore Sulphuretted hydrogen, recognized by its odour, results from sulphides containing water, and hydrosulphides. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Silver parted from iron with antimony sulphide Prior to 1500 A.D. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z It may be prepared by heating cuprous sulphide with sulphur, or triturating cuprous sulphide with cold strong nitric acid, or as a dark brown precipitate by treating a copper solution with sulphuretted hydrogen. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" Calcium sulphide, possibly; I saw them spreading it above ground in the sun. Astounding Stories of Super-Science, June, 1930 They are simply sulphur matches tipped with a mixture of chlorate of potash and sulphide of antimony, and were ignited by drawing them briskly through a little piece of folded glass-paper. The Story of a Tinder-box To the filtrate from the aluminium, iron and chromium precipitate, ammonia and ammonium sulphide are added; the precipitate may contain nickel, cobalt, zinc and manganese sulphides. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Silver sulphide is created by adding sulphur, and is drawn off in a silver-copper regulus. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The roasted ore is then smelted to a mixture of copper and iron sulphides, known as copper “matte” or “coarse-metal,” which contains little or no arsenic, antimony or silica. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" The ore of this district is almost wholly composed of blackish silver sulphides. Aztec Land This completes the detector but, for use in this instrument, lead sulphide or Galena crystals must be secured. Boy Scouts Handbook The First Edition, 1911 The next group may contain black nickel and cobalt sulphides, flesh-coloured manganese sulphide, and white zinc sulphide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" He also introduced new metallurgical processes for the profitable handling of the low-grade sulphide ores that constituted most of the mineral body of the mines. Herbert Hoover The Man and His Work Thus iron is not stable in the presence of water molecules, and it becomes iron oxide; iron oxide is not stable in the presence of hot sulphur, it becomes an iron sulphide. The Machinery of the Universe Mechanical Conceptions of Physical Phenomena Or a sulphide deposit originating through igneous agencies may undergo two or three successive enrichments, each successive one secondary to the preceding, but primary to the one following. The Economic Aspect of Geology Give tests for a chloride, sulphide, sulphate, nitrate, and carbonate. Boy Scouts Handbook The First Edition, 1911 Many substances were employed in ancient medicine: galena was the basis of a valuable Egyptian cosmetic and drug; the arsenic sulphides, realgar and orpiment, litharge, alum, saltpetre, iron rust were also used. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" It manufactures olive oil, soap, carbon sulphide and playing-cards, and has a large iron foundry. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" The principal constituents found in mineral waters are sodium, magnesium, calcium and iron, in combination with the acids to form chlorides, sulphates, sulphides and carbonates. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Native sulphur is also found in mineral springs from which hydrogen sulphide issues, where it is produced by the oxidation of the hydrogen sulphide. The Economic Aspect of Geology Azurite occurs with malachite in the upper portions of deposits of copper ore, and owes its origin to the alteration of the sulphide or of native copper by water containing carbon dioxide and oxygen. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" Filter from the bismuth hydrate, and if copper is present, add potassium cyanide till the colour is destroyed, then pass sulphuretted hydrogen, and cadmium is precipitated as the yellow sulphide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Barium sulphide, BaS, is obtained by passing sulphuretted hydrogen over heated barium monoxide, or better by fusion of the sulphate with a small coal. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" I grabbed the reins from Paulette, and I thought of skunks, and a sulphide factory,—and dead skunks and rotten sulphide at that. The La Chance Mine Mystery The oxidation and neutralization of these hot-spring solutions near the surface throws out the mercury sulphide. The Economic Aspect of Geology Oxidation usually alters treatment problems, and oxidized ore of the same grade as sulphides can often be treated more cheaply. Principles of Mining Valuation, Organization and Administration The solution with ammonium sulphide gives a white precipitate of zinc sulphide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Thus, some years before the opening of the story, he had deliberately buried one poor lady alive in a cave containing sulphide of mercury. Punch, or the London Charivari, Vol. 147, August 26th, 1914 It looked like gin, and it smelt like a sulphide factory when it got on my clothes. The La Chance Mine Mystery In some deposits, as in the copper deposits of Ray and Miami, there is found, below the secondary sulphide zone, a lean sulphide zone which is evidently of primary nature. The Economic Aspect of Geology Second, the metal content of ores, especially when in the form of sulphides, is usually more friable than the matrix, and in actual breaking of samples an undue proportion of friable material usually creeps in. Principles of Mining Valuation, Organization and Administration Warming with ammonium sulphide dissolves out the arsenic, antimony and tin salts, which are reprecipitated by the addition of hydrochloric acid to the ammonium sulphide solution. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The liquid is filtered and the lead salts separated by means of a current of hydrogen sulphide. The Medicinal Plants of the Philippines Vile drugs have been thrown into our meetings and on our clothes—assafoetida and hydrogen sulphide. Fighting the Traffic in Young Girls or, War on the White Slave Trade In general the processes of oxidation and secondary sulphide enrichment have been studied mainly by qualitative methods with the aid of the microscope and by considerations of possible chemical processes. The Economic Aspect of Geology On several gold mines, however, tests on accumulated samples for their sulphide percentage showed a distinctly greater ratio than the tenor of the ore itself in the mill. Principles of Mining Valuation, Organization and Administration The residue from the ammonium sulphide solution is warmed with dilute nitric acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" In some instances, more particularly in sluggish papular acne, arsenic, especially the sulphide of arsenic, acts favorably. Essentials of Diseases of the Skin Including the Syphilodermata Arranged in the Form of Questions and Answers Prepared Especially for Students of Medicine Soap and Sulphide of Potassium are antidotes against arsenic and other metallic poisons: Metallic … lick … cat-lick … wash … soap … potash soap … potassium … sulphide of potassium. Assimilative Memory or, How to Attend and Never Forget The same processes which produce clay also produce, under special conditions, iron ores, bauxites, the oxide zones of many sulphide ore bodies, and soils, all of which are referred to on other pages. The Economic Aspect of Geology The secondary enrichment of silver deposits at the top of the sulphide zone is sometimes a most pronounced feature, and it seems to be the explanation of the origin of many "bonanzas." Principles of Mining Valuation, Organization and Administration Quicksilver occurs in the mineral cinnabar, a sulphide. Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges This is one of the most necessary items to bear in mind in using the sulphide process. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements The copper ores occur as sulphides along certain bands in the chloritic and micaceous schists, similar in composition and probably in age to those worked further east in Kumáon, in Nipál, and in Sikkim. The Panjab, North-West Frontier Province, and Kashmir Some of the deposits are still protected by this overlying blanket and mining has not yet reached the zone of altogether primary sulphides. The Economic Aspect of Geology Silver deposits are often differentially enriched in the oxidized zone, and at times tend to concentrate in the upper sulphide zone. Principles of Mining Valuation, Organization and Administration In the United States the best known mines are in the Galena-Joplin District, in Missouri and Kansas, which produce about two-thirds of the home product—mainly from the ore blende, a sulphide. Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges That of the purest sulphide may be kept and used again, though it is not really good policy to do so. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements A dilute solution of ammonium sulphide can be employed as a clearing agent. Photographic Reproduction Processes Toward the surface the copper is in part in the form of sulphides, somewhat altered to oxide minerals, and farther down it is entirely native copper, associated with gypsum. The Economic Aspect of Geology As the gold is usually associated with the sulphides, the samples showed higher values than the mill. Principles of Mining Valuation, Organization and Administration Iron pyrites, or sulphide of iron, sometimes called "fools' gold," is a very common mineral. Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges A good sulphide tone presupposes a good black and white bromide. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements In this a zinc sulphide screen is fitted at the end of a short brass tube, with a speck of radium about a millimeter away from it. The Life Radiant About two-thirds of the zinc occurs as the sulphide and about one-third as the carbonate resulting from weathering of the sulphide. The Economic Aspect of Geology In this manner we can account for the enormous concentration of values in the lower oxidized and upper sulphide zones overlying very lean sulphides in depth. Principles of Mining Valuation, Organization and Administration Lead ores, mainly galena or lead sulphide, occur abundantly in the Rocky Mountains, Colorado, Idaho, and Utah, producing more than half the total output of the United States. Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges Not so, however, in the case of the sulphide solution, which requires to be very carefully made up and used. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements It is recovered from sulphur waste by the Chance process, which consists in converting the sulphur into hydrogen sulphide, and burning the latter with insufficient air for complete combustion. On Laboratory Arts In other cases, sulphide enrichment does not appear to have contributed greatly to the values. The Economic Aspect of Geology While cases do occur of gold deposits richer in the upper sulphide zone than below, even the upper sulphides are usually poorer than the oxidized region. Principles of Mining Valuation, Organization and Administration They were thin strips of wood or cardboard coated with sulphur and tipped with a mixture of mucilage, chlorate of potash, and sulphide of antimony. Home Life in Colonial Days The tone given by this kind of sulphide is usually of a more purplish color. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements On keeping the solutions there is a progressive interaction of the bisulphide and alkali, with formation of trithiocarbonates and various sulphides. Researches on Cellulose 1895-1900 A platinum arsenide, called sperrylite, is sometimes found associated with sulphide minerals in basic igneous rocks. The Economic Aspect of Geology Low-grade ores of lead, copper, and zinc may be treatable by concentration when in the form of sulphides, and may be valueless when oxidized, even though of the same grade. Principles of Mining Valuation, Organization and Administration The common are is chalcopyrite, a copper sulphide; that is, it is composed of copper and sulphur. The Western United States A Geographical Reader Both of these are converted into silver sulphide when treated with a solution of sodium sulphide. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements On the other hand, by treatment with ammonium sulphide at 35°-40° 'denitrated' products were obtained without action on alkaline copper solutions. Researches on Cellulose 1895-1900 Mercuric sulphide forms the brilliant red pigment, vermilion, and mercuric oxide is becoming increasingly important in anti-fouling marine paint for ship-bottoms. The Economic Aspect of Geology Only recently, however, has it been appreciated that this secondary alteration extends into the sulphide zone as well. Principles of Mining Valuation, Organization and Administration From malachite they obtained several shades of green, from cinnabar or sulphide of mercury, a number of reds. Chinese Painters A Critical Study Thus, prints to be toned with uranium require to be distinctly on the pale side, whilst those for sulphide toning are best a little vigorous. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements Denitration.—The removal of the nitric groups from the esters is effected by digestion with ammonium sulphide. Researches on Cellulose 1895-1900 Stannite, a sulphide of copper, iron, and tin, is found in some of the Bolivian deposits but is rare elsewhere. The Economic Aspect of Geology The bearing of the secondary alteration, both in the oxidized and upper sulphide zones, is of the most sweeping economic character. Principles of Mining Valuation, Organization and Administration The smell of hydrogen sulphide was dearer to him than any incense; his fingers shut upon the test-tubes with a greedier clutch than any they had ever given to The Book of Common Prayer. The Brentons The material for the toning or darkening of the bleached print is the chemical substance, sodium sulphide, of the formula Na2S·9H2O. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements In decomposing these products by acid reagents hydrogen sulphide and free sulphur are formed, the estimation of which presents no special difficulties. Researches on Cellulose 1895-1900 With the cassiterite are often found minerals of tungsten, molybdenum, and bismuth, as well as sulphides of iron, copper, lead, and zinc, and in some cases there is evidence of a rough zonal arrangement. The Economic Aspect of Geology Zinc, iron, and lead sulphides are a common primary combination. Principles of Mining Valuation, Organization and Administration Although, in these days of pure caustic soda, spent lyes are more free from impurities than formerly, the presence of sulphides and sulphites should be carefully avoided, if it is desired to produce good glycerine. The Handbook of Soap Manufacture Not that this totally unfits the sulphide for use. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements Black.—Prepare the dye-bath with 200 gallons of water, 10 lb. soda, 10 lb. sulphide of sodium, 60 lb. salt and 16 lb. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student For this purpose it is employed both in the ground form and in the manufacture of lithopone, a widely used white paint consisting of barium sulphate and zinc sulphide. The Economic Aspect of Geology Copper ores generally show violent enrichment at the base of the oxidized, and at the top of the sulphide zone. Principles of Mining Valuation, Organization and Administration Any sulphide causes a blackening of the lead acetate paper. The Handbook of Soap Manufacture Fossiliferous argillaceous limestone, containing traces of lead sulphide. Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. Black.—Prepare the dye-bath with 10 lb. soda, 10 lb. sulphide of sodium, 60 lb. salt and 25 lb. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The zone of deposition of secondary sulphides thus formed is called the zone of secondary sulphide enrichment. The Economic Aspect of Geology In the easy recognition of the secondary copper sulphides, chalcocite, bornite, etc., the engineer finds a finger-post on the road to extension in depth; and the directions upon this post are not to be disregarded. Principles of Mining Valuation, Organization and Administration The amount of sulphides may be estimated by titrating the hot soda solution, to which ammonia has been added, with an ammoniacal silver nitrate solution, 1 c.c. of which corresponds to 0.005 gramme Na2S. The Handbook of Soap Manufacture Impure air, or sulphuretted hydrogen, browns or blackens white lead, converting it partially or wholly into sulphide. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Sulfaniline black G, 60 lb. salt, 10 lb. soda, and 5 lb. sulphide of sodium. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student With the discovery of undoubted evidence of secondary sulphide enrichment, there was a natural tendency to magnify its importance as a cause of values. The Economic Aspect of Geology I never cared particularly for hydrogen sulphide and sulphur dioxide, either," he assured her, "but they aren't strong enough to hurt us in the short time we'll be here. Spacehounds of IPC It is a new substance with new properties, resulting from the chemical union of iron and sulphur, and is called iron sulphide. An Elementary Study of Chemistry With all the sulphides of cadmium a steel palette knife is best avoided. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Immedial black and 3 lb. sulphide of soda, and to every 10 gallons of water added to bring the bath up to volume ½ lb. soda and 3 lb. salt. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The solid masses of chalcocite in the Kennecott copper mines seem hardly explainable as the result of secondary sulphide enrichment. The Economic Aspect of Geology Because it is in what is called a sulphide form. The Wonder Island Boys: The Mysteries of the Caverns It has been seen that iron sulphide is composed of two entirely different substances,—iron and sulphur. An Elementary Study of Chemistry This opinion, indeed, extends to all metallic sulphides, and our belief is, that if vermilions were made generally by wet processes, they would not be found the permanent pigments they undoubtedly are. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Immedial bronze A, 2 lb. soda, 2 lb. sulphide of sodium and 10 lb. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Undoubted evidence of secondary sulphide enrichment has led in some quarters to an assumption of effectiveness in producing values which is apparently not borne out by quantitative tests. The Economic Aspect of Geology There is every reason to believe that these inclusions are in the greater majority of cases manganese sulphide. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The water still further cools the gas and at the same time partially removes such gaseous products as hydrogen sulphide and ammonia, which are soluble in water. An Elementary Study of Chemistry Under this name a lemon sulphide of cadmium has lately appeared, to which the foregoing remarks are applicable. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists It is a grey, very heavy powder, consisting mostly of finely divided metallic zinc, with traces of oxide and sulphide of zinc. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The deposits are regarded as having been formed by circulating waters which collected the minerals disseminated through the sedimentary rocks, and deposited them on contact with carbonaceous matter, earlier sulphides, or other precipitating agents. The Economic Aspect of Geology It has been demonstrated many times that the ordinary grades of bessemer screw stock are unsatisfactory for aviation purposes, due to the presence of excessive amounts of unevenly distributed phosphorus and sulphide segregations. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel The coal reduces the sulphate to sulphide, which in turn reacts upon the calcium carbonate. An Elementary Study of Chemistry With sulphides or pigments containing sulphur, orpiment may be used with less danger. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Pass a current of sulphuretted hydrogen gas through the solution; if there be any tin present a brown precipitate of tin sulphide will be obtained. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Pyrite, the yellow iron sulphide, is the commonest and most abundant of the metallic sulphides. The Economic Aspect of Geology Pass a current of sulphuretted hydrogen gas through the solution, if there be any tin present a brown precipitate of tin sulphide will be obtained. The Dyeing of Woollen Fabrics It occurs in nature in many forms of combination,—in large deposits as oxides, sulphides, and carbonates, and in smaller quantities in a great variety of minerals. An Elementary Study of Chemistry The new metal indium, for instance, furnishes a bright yellow sulphide, like that of cadmium. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists This precipitate is insoluble in cold dilute acids, in ammonium sulphide, and in solutions of the caustic alkalis, a behaviour which distinguishes it from the yellow sulphides of arsenic and tin. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Marcasite and pyrrhotite, other iron sulphide minerals, are frequently found with pyrite and are used for the same purposes. The Economic Aspect of Geology The problem of the profitable treatment of the sulphide ores has been practically solved here. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" The three elements occur in nature to some extent in the free state, but are usually found as sulphides. An Elementary Study of Chemistry Called also Mineral Yellow, has improperly been classed as an orpiment, from which it differs in not being a sulphide, and in containing lead. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists It can also be determined as sulphide, by precipitation with sulphuretted hydrogen, the precipitated sulphide being dried at 100� C. and weighed. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" The primary ores consist of pyrite, chalcopyrite, and other sulphides, with large amounts of jaspery quartz and some calcite and dolomite. The Economic Aspect of Geology They contain the volatile principle, "sulphide of allyl," which is acrid and stimulating. Herbal Simples Approved for Modern Uses of Cure Why is the silver sulphide first changed into silver chloride? An Elementary Study of Chemistry They are not absolutely insoluble in water, and the sulphide of thallium being brown, would probably be damaged by impure air. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The solution of acetate of morphine may be freed from excess of lead by hydrogen sulphide and filtered, excess of hydrogen sulphide driven off by heat, and tests applied. Aids to Forensic Medicine and Toxicology They consist dominantly of the oxide minerals, though in several ore bodies sulphides have been shown by diamond-drilling. The Economic Aspect of Geology Leisurely they rode—stopping at times for several days at places where the food and drink were at their best, and the society sulphide. Little Journeys to the Homes of the Great - Volume 10 Little Journeys To The Homes Of Great Teachers The sulphide is roasted in the air until a part of it has been changed into oxide and sulphate. An Elementary Study of Chemistry Having in common with cadmium sulphides a certain amount of transparency, it is invaluable for gorgeous sunsets and the like, either alone or compounded with aureolin. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Method of Extraction from the Stomach.—Boil the contents of the stomach in water, filter, pass hydrogen sulphide, filter, collect precipitate and boil in nitric acid, filter, dilute filtrate with water and apply tests. Aids to Forensic Medicine and Toxicology The carrying down of lead in solution and its deposition below the water table as a secondary sulphide is not proved on any extensive scale. The Economic Aspect of Geology After a time the copper was found to have become coated with sulphide, while the tin was largely converted into the explosive basic nitrate. Scientific American Supplement, No. 365, December 30, 1882 When gold occurs along with metallic sulphides it is often extracted by chlorination. An Elementary Study of Chemistry Mr. Crookes, who discovered this new metal in 1861, believes that the deep orange shade observable in some specimens of sulphide of cadmium is due to the presence of thallium. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists From the acid solution, hydrogen sulphide precipitates copper, lead, and mercury, dark; arsenic, antimony, and tin, yellowish. Aids to Forensic Medicine and Toxicology In this respect it contrasts with zinc; and when the two minerals occur together, lead is likely to be more abundant in the oxide zone, and zinc in the sulphide zone below. The Economic Aspect of Geology If a cyanide solution blackens on the addition of the silver nitrate it contains sulphide. A Text-book of Assaying: For the Use of Those Connected with Mines. The sulphides of calcium, barium, strontium, and magnesium are insoluble in water, but are changed by hydrolysis into acid sulphides which are soluble. An Elementary Study of Chemistry He has frequently found it, he says, in the dark-coloured varieties, and considers the variations of colour in cadmium sulphide to be owing to traces of thallium. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Pass hydrogen sulphide through the filtered or dialyzed fluid until a precipitate ceases to fall; collect the sulphide thus formed, wash and dry it. Aids to Forensic Medicine and Toxicology The source of the primary sulphides has been a subject of much discussion. The Economic Aspect of Geology The copper is separated from the solution as sulphide by means of a rapid current of sulphuretted hydrogen. A Text-book of Assaying: For the Use of Those Connected with Mines. The elements occur in nature chiefly as oxides and sulphides, though they have been found in very small quantities in the native state, usually in meteorites. An Elementary Study of Chemistry The tint of cadmium sulphide is a mere matter of manufacture, seeing that from the same sample of metal there can be obtained lemon-yellow, pale yellow, deep yellow, orange-yellow, and orange-red. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Treated with sulphuretted hydrogen, a characteristic orange-red sulphide is formed. Aids to Forensic Medicine and Toxicology Some of the zinc carried down has been redeposited secondarily as zinc sulphide. The Economic Aspect of Geology The filtrate from the sulphide of arsenic is rendered alkaline with ammonia and "magnesia mixture" added. A Text-book of Assaying: For the Use of Those Connected with Mines. Their sulphides, carbonates, and phosphates are insoluble in water, the other common salts being soluble. An Elementary Study of Chemistry To the colour of oxide of zinc, sulphuretted hydrogen is altogether harmless; sulphide of zinc being itself white. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists If no precipitate, add ammonia and ammonium sulphide, iron, black, zinc, white, chromium, green, manganese, pink. Aids to Forensic Medicine and Toxicology The zinc sulphide is associated with lead, iron, and copper sulphides and gold and silver minerals. The Economic Aspect of Geology The precipitated sulphides, after digesting with soda and washing, are dissolved in nitric acid and the solution boiled with ammonium carbonate. A Text-book of Assaying: For the Use of Those Connected with Mines. Ferrous sulphide is sometimes found in nature as a golden-yellow crystalline mineral. An Elementary Study of Chemistry If the former parted with some of its sulphur to the latter, sulphide of lead would result, which is black. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists If the solution be now added to a large bulk of water, the white oxychloride is precipitated, which is soluble in tartaric acid and precipitated orange yellow with hydrogen sulphide. Aids to Forensic Medicine and Toxicology Locally there is evidence of solution of gold in weathered zones and its deposition in the sulphide zones below. The Economic Aspect of Geology Their chief characteristic is solubility in an alkaline solution, from which sulphuretted hydrogen produces a white precipitate of zinc sulphide. A Text-book of Assaying: For the Use of Those Connected with Mines. Write the equations showing how each of the following compounds of iron could be obtained from the metal itself: ferrous chloride, ferrous hydroxide, ferrous sulphate, ferrous sulphide, ferrous carbonate, ferric chloride, ferric sulphate, ferric hydroxide. An Elementary Study of Chemistry Being, like the deep and 'pale' varieties, sulphides, they are of course unaltered by sulphurous gas; but they will not stand exposure to light and air, or even to light alone. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Treat this with excess of bisulphate of sodium, then saturate with sulphuretted hydrogen until metals are thrown down as sulphides. Aids to Forensic Medicine and Toxicology The antimony sulphide, stibnite, is the source of most of the world's production of this metal. The Economic Aspect of Geology In assaying ores, the copper is dissolved and separated with sulphuretted hydrogen as in the other processes, but the sulphide should be washed more completely to ensure the absence of iron salts. A Text-book of Assaying: For the Use of Those Connected with Mines. Write the equation representing the action of ammonium sulphide upon chromium sulphate. An Elementary Study of Chemistry The perfect impunity with which it bears the action both of sulphuretted hydrogen and sulphide of ammonium is remarkable. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Other watchglasses, treated with sulphide of ammonium or sulphate of iron and liquor potassæ, will give the reactions of the acid with appropriate tests. Aids to Forensic Medicine and Toxicology Secondary sulphide enrichment of antimony deposits, if it occurs at all, is negligible. The Economic Aspect of Geology Bismuth is nearly always found in nature in the metallic state; but occasionally it is met with as sulphide in bismuthine and as carbonate in bismutite. A Text-book of Assaying: For the Use of Those Connected with Mines. Show that the preparation of sulphur dioxide from a sulphite is similar in principle to the preparation of hydrogen sulphide. An Elementary Study of Chemistry The former gas may be continuously passed into the colour suspended in water, or a strong solution of the latter sulphide be poured upon it, and the yellow remains unchanged. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists A delicate test for lead in water is to stir the water, concentrated or not, with a glass rod dipped in ammonium sulphide: a brown coloration is produced. Aids to Forensic Medicine and Toxicology The large fluorspar deposits of Illinois and Kentucky contain fluorite with calcite, barite, and metallic sulphides, in wide veins filling fissures in limestones and sandstones and replacing the fissure walls. The Economic Aspect of Geology If the separated sulphide be heated in a borax bead, the colour obtained will be a sherry brown in the outer flame, and grey or colourless in the inner flame if nickel only is present. A Text-book of Assaying: For the Use of Those Connected with Mines. The most important are the sulphide, carbonate, and hydroxide. An Elementary Study of Chemistry Native ultramarine consists of silica, alumina, sulphur, and soda; its colouring matter seeming to be due to hyposulphite of soda and sulphide of sodium. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The chloride of bismuth is also precipitated white, but the precipitate is not soluble in tartaric acid, and the precipitate with hydrogen sulphide is black. Aids to Forensic Medicine and Toxicology The principal copper minerals may be classified into the sulphide group, the oxide group, and native copper. The Economic Aspect of Geology The precipitate will contain the nickel and cobalt as sulphides. A Text-book of Assaying: For the Use of Those Connected with Mines. When prepared by precipitation the sulphide is white. An Elementary Study of Chemistry They have all become pale, whitish, or of a drab cast, evidently through the oxidation of the sulphur, or rather the sulphide of iron formed during the calcination. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Sewer Gas.—Cesspool emanations usually consist of a mixture of sulphuretted hydrogen, sulphide of ammonium, and nitrogen; but sometimes it is only deoxidized air with an excess of carbonic acid gas. Aids to Forensic Medicine and Toxicology The remaining 85 per cent is derived from the sulphide group. The Economic Aspect of Geology When iron is present it will be reduced to the ferrous state before the copper sulphide begins to separate. A Text-book of Assaying: For the Use of Those Connected with Mines. Antimony is prepared from the sulphide in a very simple manner. An Elementary Study of Chemistry This substance is the sulphide of lead, found native in the beautiful lead ore, or Galena, of Derbyshire. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists If we now add a little ammonium sulphide to this solution, we get the spectrum of reduced hæmoglobin, which is a single broad absorption band situated in the interval between the preceding oxyhæmoglobin bands. Aids to Forensic Medicine and Toxicology Very commonly the copper sulphides are associated with large quantities of the iron sulphide, pyrite, as well as with varying amounts of lead and zinc sulphides and gold and silver minerals. The Economic Aspect of Geology The solution of the ore and the separation of the copper as sulphide are effected in the same ways as have been already described for electrolysis. A Text-book of Assaying: For the Use of Those Connected with Mines. Among the ammonium salts the chloride, sulphate, carbonate, and sulphide are the most familiar. An Elementary Study of Chemistry An artificial sulphide can be prepared by dry and wet processes, which is subject to gradual oxidation on exposure to the air, and consequent conversion into grey or white. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Veins of sulphide of mercury, cinnabar, or vermilion have been found in other parts of the Protectorate: we suspected their presence at Apatim, and collected specimens, still to be assayed. To The Gold Coast for Gold, Vol. II A Personal Narrative The primary copper mineral in the limestone is chalcocite, in exceptionally rich and solid masses, showing no evidence of having replaced earlier sulphides. The Economic Aspect of Geology The chief ore of lead is galena, a sulphide of lead, common in most mining districts, and frequently associated with blende and copper-pyrites. A Text-book of Assaying: For the Use of Those Connected with Mines. These sulphides in turn decompose by further action of oxygen, so that the final products of the reaction are those given in the equation. An Elementary Study of Chemistry Another kind of "vermilion" consists entirely of peroxide of iron, prepared especially to imitate the brilliant and costly sulphide of mercury, which it does very well, and is largely used in England, France, and America. Scientific American Supplement, No. 315, January 14, 1882 In making glass to be used for mirrors, a considerable portion of sodium sulphate is used, and in annealing, this is partly reduced to sodium sulphide, which effloresces on the surface of the glass. Scientific American Supplement, No. 1178, June 25, 1898 Abundant fragments of both the oxide and the sulphide ores are mined from the lateral moraine of a nearby glacier. The Economic Aspect of Geology Jamesonite and other sulphides of lead and antimony are frequently met with. A Text-book of Assaying: For the Use of Those Connected with Mines. The ores employed in the preparation of zinc are chiefly the sulphide, oxide, and carbonate. An Elementary Study of Chemistry The tissues assume a greenish-black colour from the formation in them of a sulphide of iron resulting from decomposition of the blood pigment. Manual of Surgery Volume First: General Surgery. Sixth Edition. The ore is a sulphide, bluish gray in color, and yields from 60 to 65 per cent. of antimony. Scientific American Supplement, No. 312, December 24, 1881 The fissures were mineralized with copper sulphides and arsenides, iron sulphides, and locally with zinc sulphide and manganese carbonate,—all in a matrix of quartz. The Economic Aspect of Geology The action of this acid on the sulphide is very violent. A Text-book of Assaying: For the Use of Those Connected with Mines. This substance bears the same relation to ferrous sulphide that hydrogen dioxide does to water. An Elementary Study of Chemistry It turns black at once, because the sulphur unites with the lead to form black sulphide of lead. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association The latter is a yellow sulphide of iron, of crystalline form, best known as "fool's gold." Artificial Light Its Influence upon Civilization Below the oxidized and leached zone there is evidence of deposition of a large amount of secondary copper sulphide in the form of chalcocite. The Economic Aspect of Geology The effect of this acid on solutions of the metals is to form sulphides. A Text-book of Assaying: For the Use of Those Connected with Mines. Under suitable conditions hydrogen combines with nitrogen to form ammonia, and with sulphur to form the foul-smelling gas, hydrogen sulphide. An Elementary Study of Chemistry The iron in water from old coal pits and shale deposits is usually present as sulphate due to the oxidation of pyrites, a sulphuret or sulphide of iron. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association Lithopone, a white pigment consisting of zinc sulphide and barium sulphate, sometimes exhibits the peculiar property of darkening on exposure to sunlight. Artificial Light Its Influence upon Civilization The most important mineral of zinc is the sulphide, sphalerite or "zinc blende." The Economic Aspect of Geology Again, the metals precipitated in the acid solution form sulphides which may be divided into groups, the one consisting of those which are soluble, and the other of those which are not soluble, in alkalies. A Text-book of Assaying: For the Use of Those Connected with Mines. Because of the fact that some metals are precipitated in this way as sulphides while others are not, hydrosulphuric acid is extensively used in the separation of the metals in the laboratory. An Elementary Study of Chemistry In the hot lead solution the wool turns black, lead sulphide being formed. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association For example, assume that phosphorescent zinc sulphide is excited by the light from a mercury-arc. Artificial Light Its Influence upon Civilization The zinc-lead ores of the type found in the Mississippi Valley are of special interest, in that they are sulphide ores of an origin apparently independent of igneous agencies. The Economic Aspect of Geology Metallic sulphides are similarly attacked; but this method of opening up minerals has the disadvantage of giving rise to the formation of anhydrous sulphates of iron, &c., which are not readily dissolved when afterwards diluted. A Text-book of Assaying: For the Use of Those Connected with Mines. The conduct of hydrosulphuric acid and water toward many substances has been seen to be very similar; the oxides and sulphides of the metals have analogous formulas and undergo many parallel reactions. An Elementary Study of Chemistry Into this liquor of brine and ammonium sulphide pure carbonic acid gas is now passed. Scientific American Supplement, No. 611, September 17, 1887 It or one of its compounds is mixed with a phosphorescent substance such as zinc sulphide and the latter glows continuously. Artificial Light Its Influence upon Civilization The primary sulphides are believed to be genetically related in some fashion to these porphyries. The Economic Aspect of Geology It oxidises most combustible substances with deflagration, and thereby converts sulphides into sulphates, arsenides into arsenates, and most metals into oxides. A Text-book of Assaying: For the Use of Those Connected with Mines. The salts of hydrosulphuric acid, called sulphides, form an important class of salts. An Elementary Study of Chemistry This ammonium sulphide is, as we shall see, quite as available for the working of the ammonia-soda manufacture as pure and simple ammonia, and all the sulphur can be obtained from it. Scientific American Supplement, No. 611, September 17, 1887 It is sold for treatment in factories by the sulphide of carbon process, and by this method yields from seven to nine per cent. of oil, of course suitable only for manufacturing purposes. Scientific American Supplement, No. 443, June 28, 1884 The precipitating agent below may be ferrous sulphate, various sulphides, native metals, or organic matter. The Economic Aspect of Geology A regulus is a sulphide of copper and iron, carrying from 30 to 40 per cent. of copper. A Text-book of Assaying: For the Use of Those Connected with Mines. Most of the sulphides are insoluble in water, and some of them are insoluble in acids. An Elementary Study of Chemistry This is decomposed by "alkali waste," giving a final liquor of calcium chloride, which is run to waste, and a quantity of ammonium sulphide gas. Scientific American Supplement, No. 611, September 17, 1887 For any system of chlorination yet introduced it is necessary to free the ore from sulphides. Scientific American Supplement, No. 620, November 19,1887 The most important mineral of silver is the sulphide, argentite or "silver glance." The Economic Aspect of Geology If the temperature during calcination has been too low sulphates are formed, which are again reduced to sulphides in the subsequent fusion. A Text-book of Assaying: For the Use of Those Connected with Mines. How many grams of iron sulphide are necessary to prepare 100 l. of hydrosulphuric acid when the laboratory conditions are 17° and 740 mm. pressure? An Elementary Study of Chemistry In the first place, the direct contact of fuel or even flame is avoided, since this reduces some of the sulphate to sulphide of calcium, the presence of which is in many respects objectionable. Scientific American Supplement, No. 794, March 21, 1891 Many white pigments, such as zinc oxide, zinc sulphide, calcium carbonate, barium carbonate, calcium sulphate, lead white, etc., turn brown to black, and no white lacquer can be obtained with them. Handbook on Japanning: 2nd Edition For Ironware, Tinware, Wood, Etc. With Sections on Tinplating and Galvanizing In addition to these definite mineral forms, silver is present in many ores in an undetermined form in other sulphides, notably in galena, sphalerite, and pyrite. The Economic Aspect of Geology Add dilute sulphuric acid in excess; filter off the yellow precipitate of sulphide of arsenic, dissolve it in nitric acid, and titrate with uranium acetate, as described under Arsenic. A Text-book of Assaying: For the Use of Those Connected with Mines. Acid sulphites and sulphides may be made in the same ways. An Elementary Study of Chemistry As sulphide of potassium is more volatile than sulphide of sodium, an incrustation is formed from the former sooner than from the latter of these salts, and is considerably thicker in the former case. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations Yellow Pigments.—Cadmium sulphide, lead chromate and orpiment. Handbook on Japanning: 2nd Edition For Ironware, Tinware, Wood, Etc. With Sections on Tinplating and Galvanizing Native silver and various silver sulphides, arsenides, and antimonides are associated with minerals of cobalt, nickel, bismuth, lead, and zinc, in a gangue of calcite and some quartz. The Economic Aspect of Geology Both lead and lead sulphide are sensibly volatile at a moderately-high temperature; hence it is necessary to obtain a slag which is easily fusible. A Text-book of Assaying: For the Use of Those Connected with Mines. They occur in comparatively small quantities and are usually found associated with sulphur and sulphides, either as the free elements or more commonly in combination with metals. An Elementary Study of Chemistry Silver Foil.—A small piece of silver foil is used for the purpose of detecting sulphur and the sulphides of the metals, which impart a dark stain to it. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations The ordinary yellow solution of ammonium sulphide used in the laboratory had the same effect as the K2S. Scientific American Supplement, No. 388, June 9, 1883 The orange-red sulphides of arsenic, orpiment and realgar, are formed both as primary minerals of igneous source and as secondary products of weathering. The Economic Aspect of Geology Arsenic.—To the filtrate from the sulphide of iron add hydrochloric acid in slight excess; filter off, and wash the precipitate. A Text-book of Assaying: For the Use of Those Connected with Mines. Iron sulphide, from whatever source, will have the same composition, which is in accordance with the law of definite composition. An Elementary Study of Chemistry The metallic sulphides are insoluble in borax, and many of the metals in the pure state. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations Another portion of the mixture of nitro-glycerin with ammonium sulphide was treated with excess of PbCO3 and a little lead acetate, filtered, and the ammonium nitrite detected in the solution. Scientific American Supplement, No. 388, June 9, 1883 These coatings have probably been formed by the decomposition of cadmium-bearing zinc sulphide in the oxide zone, the carrying down of the cadmium in solution, and its precipitation as secondary cadmium sulphide. The Economic Aspect of Geology The rest is recovered, after the removal of the stannous sulphide, by evaporating to dryness, taking up with hydrochloric acid, and filtering through the same filter. A Text-book of Assaying: For the Use of Those Connected with Mines. Iron sulphide is a salt of hydrosulphuric acid, and this reaction is therefore similar to the one which takes place when sulphuric acid acts upon a nitrate. An Elementary Study of Chemistry By heating it upon charcoal it fuses in the reducing flame, and is reduced to a sulphide. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations To separate the paraffin from the sulphur the residue is heated with a solution of ammonium sulphide. Nitro-Explosives: A Practical Treatise Minor sources include the black or gray sulphide, metacinnabar, the native metal, and the white mercurous chloride, calomel. The Economic Aspect of Geology The precipitation as sulphide is only complete on prolonged treatment; a green colour indicates that some molybdenum still remains in solution. A Text-book of Assaying: For the Use of Those Connected with Mines. In solution in water it turns blue litmus red and neutralizes bases, forming salts called sulphides. An Elementary Study of Chemistry If the compound examined be the sulphide of antimony, the one-thousandth part can be readily detected, and hence this method is admirably adapted to the examination of medicinal antimonial compounds. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations After heating for some time, the contents of the retort and receiver are mixed and diluted, and the mercury is precipitated by hydrogen sulphide. Nitro-Explosives: A Practical Treatise In short, the Lake Superior iron ores are residual deposits formed by exactly the same weathering processes as cause the accumulation of clays, bauxites, and the oxide zones of sulphide deposits. The Economic Aspect of Geology Similarly, large quantities of copper precipitated as sulphide by means of sulphuretted hydrogen will carry zinc with it, except under certain nicely drawn conditions. A Text-book of Assaying: For the Use of Those Connected with Mines. In combination, sulphur occurs abundantly in the form of sulphides and sulphates. An Elementary Study of Chemistry A solution of soda must not be changed by the addition of sulphide of ammonium. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations By warming and exposure to the air in open vessels the hydrogen sulphide is for the most part dissipated. Nitro-Explosives: A Practical Treatise Iron ores due to weathering of sulphide ores. The Economic Aspect of Geology Dissolve the sulphide off the filter with hot dilute hydrochloric acid, which is best done by a stream from a wash bottle. A Text-book of Assaying: For the Use of Those Connected with Mines. Most metals when heated with sulphur combine directly with it, forming metallic sulphides. An Elementary Study of Chemistry It must be perfectly white, free from iron, charcoal, and sulphide of potassium. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations The small amount of antimony sulphide present does not interfere with the recognition of the end point. Nitro-Explosives: A Practical Treatise A relatively minute portion of the world's iron ore comes from the "gossans" or "iron caps" over deposits of iron sulphides. The Economic Aspect of Geology Render alkaline with ammonia, and add ammonium sulphide till the precipitate is dissolved. A Text-book of Assaying: For the Use of Those Connected with Mines. Hydrosulphuric acid is prepared in the laboratory by treating a sulphide with an acid. An Elementary Study of Chemistry Sulphide of lithium, formed by heating the sulphate in the reducing flame, is volatilized in similar manner by a strong blast, although less readily than the sulphide of sodium. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations After titration, the solution is filtered through a small 5-1/2 cm. filter paper, which retains the antimony sulphide. Nitro-Explosives: A Practical Treatise The first, the sulphide type, is represented by the great ore bodies of the Sudbury district. The Economic Aspect of Geology Fuse it with fusion mixture, take up with hydrochloric acid, filter, pass sulphuretted hydrogen through the filtrate, collect and wash the sulphide of tin. A Text-book of Assaying: For the Use of Those Connected with Mines. This substance is a gas having the composition expressed by the formula H2S and is commonly called hydrogen sulphide. An Elementary Study of Chemistry The sulphide of arsenic will first rise, but soon the arsenic will adhere to the sides of the tube. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations It is then washed repeatedly with the same solution until the washings give no coloration with ammonium sulphide, and afterwards washed with acetone until washings give no residue on evaporation dried and weighed. Nitro-Explosives: A Practical Treatise These are situated in the basal portions of a great norite intrusive, and are ascribed to segregation of the sulphides as the rock solidified. The Economic Aspect of Geology |
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