| 单词 | baryta |
| 例句 | Failing in this, he found what till then was unknown, that sulphuret of baryta would "absorb the sun's rays by day, to emit them by night." The Catholic World; Volume I, Issues 1-6 A Monthly Eclectic Magazine 2012-04-05T02:00:40.207Z Of or pertaining to an alkali or to alkalies; having the properties of an alkali. ÷ earths, certain substances, as lime, baryta, strontia, and magnesia, possessing some of the qualities of alkalies. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z In the eastern part of Kentucky there are well-defined deposits of lead-bearing baryta, though, up to date, their development has not proved successful. The Business of Mining A brief non-technical exposition of the principles involved in the profitable operation of mines 2012-02-18T03:00:17.387Z The binoxide of barium is pulverized and subjected to the action of carbonic acid to remove any unconverted caustic baryta present. 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 earths were gradually distinguished from each other; lime was recognized as a substance distinct from baryta, baryta as distinct from alumina, etc. Heroes of Science Chemists 2011-12-09T03:00:21.047Z Here the track of the disused mining tram is a well-engineered road direct to the foot of the crag, where the fragments of the baryta mine are littered about. Climbing in The British Isles. Vol. 1 - England 2011-11-14T03:00:21.670Z In chemistry the term earth is given to certain metallic oxides, such as the 'alkaline earths' lime, baryta, and strontia; also to alumina and a series known as the 'rare earths'. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z Sulphates.—Only two sulphates may be noticed—namely, gypsum, which is a sulphate of lime, with its varieties, selenite, satin-spar, and alabaster; and barytes, a sulphate of baryta. Geology 2011-02-20T03:00:12.660Z It may be readily recognized by the white precipitate which it forms when passed through lime or baryta water. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" In the year 1808 he succeeded in decomposing the three earths, lime, baryta and strontia, and in obtaining the metals calcium, barium and strontium, but not in a perfectly pure condition, or in any quantity. Heroes of Science Chemists 2011-12-09T03:00:21.047Z The barium and magnesium salts of this acid are formed when baryta and magnesia are fused with cobalt sesquioxide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" Add baryta water till alkaline, and evaporate to dryness. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Sir H. Davy tried to electrolyse baryta, but was unsuccessful; later attempts were made by him using barium chloride in the presence of mercury. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Pyroxylin is made by treating cotton with equal parts of nitric and sulphuric acids, then washing with water till the latter ceases to give a precipitate with chloride of baryta; then dry in the air. The Medicinal Plants of the Philippines This table tells us that the affinity of baryta for sulphuric acid is greater than that of strontia for the same acid, that of strontia greater than that of potash, and so on. Heroes of Science Chemists 2011-12-09T03:00:21.047Z Among the infinitude of white substances, the artist finds that there are but three white pigments—those of lead, zinc, and baryta. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Add excess of pure solid baryta and allow to stand until the reaction is again alkaline. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. A beautiful green fire may be thus made: Take of flour of sulphur, thirteen parts; nitrate of baryta, seventy-seven; oxy-muriate of potassa, five; metallic arsenic, two; and charcoal, three. Home Pastimes; or Tableaux Vivants It is dextrogyrous and is precipitated by the neutral acetate of lead and by caustic baryta. The Medicinal Plants of the Philippines The decomposition of potash, soda, baryta, lime and strontia could not have been effected had he not had at his command the resources of a well-furnished laboratory. Heroes of Science Chemists 2011-12-09T03:00:21.047Z But as no beauty of colour compensates for want of durability, their place should be supplied by lemon yellow proper, or chromate of baryta. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Nitrate of baryta will show the presence of sulphuric acid, and nitrate of silver of hydrochloric acid. Aids to Forensic Medicine and Toxicology Let the nitrate of baryta be well dried and powdered; then add to it the other ingredients, all finely pulverized, and exceedingly well mixed and rubbed together. Home Pastimes; or Tableaux Vivants Chromate of baryta is then thrown down, by the addition of bichromate of potash, as a yellow precipitate. A Text-book of Assaying: For the Use of Those Connected with Mines. Sulphate of baryta, the well known adulterate of white lead, does the work. Scientific American Supplement, No. 1178, June 25, 1898 Drying well, working well in oil and fresco, ultramarine may be safely compounded with pigments generally, excepting only an acid sulphate of baryta or constant white. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Cyanine appears to behave as an acid, at least it forms with lime, baryta, strontia, oxide of lead, &c., green compounds insoluble in water. The Art of Perfumery And Methods of Obtaining the Odors of Plants Take of nitrate of baryta, twenty-seven parts, by weight; of sulphur, thirteen; of chloride of potassa, five; of realgar, two; and of charcoal three parts. Home Pastimes; or Tableaux Vivants The gravimetric determination of baryta, when lime and strontia are absent, is as follows:—The solution, if it contains much free acid, is nearly neutralised with ammonia, and then diluted to 100 or 200 c.c. A Text-book of Assaying: For the Use of Those Connected with Mines. The baryta is a heavy grayish porous substance prepared by carefully igniting the nitrate of barium; and of this each retort having the above dimensions holds about 125 lb. Scientific American Supplement, No. 623, December 10, 1887 A more eligible preparation is the molybdate of baryta, produced by mixing solutions of molybdate of potash and acetate of baryta. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Baryta.—The soluble salts of baryta, moistened, and then submitted to the reduction flame, produce a green color. 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 A drop of phenolphthalein is now added, a little water, and the acidity determined by titration with deci-normal baryta solution, and the baryta solution taken calculated as oleic acid. Nitro-Explosives: A Practical Treatise It is separated from baryta by dissolving in a little hydrochloric acid, adding ammonia in excess, and then acidifying with acetic acid, and precipitating the baryta with potassium bichromate, as described under Baryta. A Text-book of Assaying: For the Use of Those Connected with Mines. Titrating apparatus The author also describes the apparatus he employs for storing and titrating with baryta solution. Scientific American Supplement, No. 623, December 10, 1887 Chromate of baryta, or chromate of bismuth is then formed, neither of which acts on the Prussian blue. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Strontia and baryta will flow into the charcoal, but lime will not. 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 contended that the cost of baryta is 10 cents per ton beets worked. Scientific American Supplement, No. 832, December 12, 1891 A correction must be made to counteract the effect of impurities in the baryta as well as errors inherent in the process. A Text-book of Assaying: For the Use of Those Connected with Mines. Each retort is closely packed with baryta in lumps about the size of a walnut. Scientific American Supplement, No. 623, December 10, 1887 One part of silica heated to whiteness with three parts of baryta, yields a pale green solid mass, permanent, but deficient in colour when ground. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Carbonate of baryta loses its carbonic acid at a red heat, becomes caustic, and colors red litmus paper blue. 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 using sulphate of baryta, ultramarine, oxide of chrome, etc., mixed with silicate of potash, fast colors are obtained similar to the semi-transparent colors of painted windows. Scientific American Supplement, No. 483, April 4, 1885 But, as this would not explode without the addition of some oxygen-bearing element, various oxygen-bearing salts were combined with it, such as nitrate of potassium, nitrate of ammonia, nitrate of baryta, etc. Scientific American Supplement, No. 821, September 26, 1891 They also found that by supplying the air to the baryta under a moderate pressure, its absorption of oxygen was greatly assisted. Scientific American Supplement, No. 623, December 10, 1887 Tungstate of baryta answers perfectly, covers as well as white lead, and is as unalterable as zinc white. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists When alcohol is poured over baryta or its salts, and inflamed, a feeble green color is communicated to the flame, but this color should not be considered a characteristic of the salt. 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 Alkaline earths, earths not soluble in water, viz., lime, magnesia, strontia, and baryta. The Nuttall Encyclopædia Being a Concise and Comprehensive Dictionary of General Knowledge From the weight of the sulphate of baryta is then computed the weight of sulphate of lime, which has passed over into solution. Scientific American Supplement, No. 821, September 26, 1891 Under these conditions, and by carefully purifying the air before use, they found that it became possible to use the baryta an indefinite number of times. Scientific American Supplement, No. 623, December 10, 1887 Constant white is a sulphate of baryta, found native and known under the name of heavy-spar, or prepared artificially by adding sulphuric acid, or a soluble sulphate, to a solution of a barytic salt. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The hydrate of strontia has the same properties as the hydrate of baryta, except that it is less soluble in water. 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 white composition, used for charging ¾ inch flambeaux, consists of 1,000 parts of chlorate of potash, 1,000 of nitrate of baryta, and 175 of boiled oil. Scientific American Supplement, No. 586, March 26, 1887 By adding chloride of barium solution the sulphuric acid is bound to the barytes and sulphate of baryta separates as white precipitate. Scientific American Supplement, No. 821, September 26, 1891 After securing patent protection for their process, Messrs. Brin erected a small producer in Paris, and successfully worked it for nearly three years without finding a renewal of the original charge of baryta once necessary. Scientific American Supplement, No. 623, December 10, 1887 Is a mixture of chloride and oxide of lead, formed by precipitating a solution of chloride of lead with soda, potash, lime, or baryta, in the caustic or hydrated state. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists It now produces the same reactions upon polished silver as the sulphate of baryta under the same conditions. 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 This gentleman therefore replaces the solution of baryta by water saturated with lime, which costs almost nothing, and the preparation of which is exceedingly simple. Scientific American Supplement, No. 460, October 25, 1884 The yields of furfuraldehyde would appear to have no definite relation to the other chemical data about a gum, such as the potash and baryta absorptions or the sugar produced on inversion. Scientific American Supplement, No. 821, September 26, 1891 Caustic baryta was applied to the printed sheet to convert the resinous ingredients of the ink into an insoluble soap, the stearine being precipitated with sulphuric acid. Heroes of the Telegraph Occasionally, starch, chalk, white clay, and carbonate of baryta, are employed as adulterants; none of which, however, are inimical to stability. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists In the presence of baryta, strontia can be detected by the following process: mix some of the substance under examination with some pure graphite and water, by grinding in an agate mortar. 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 Carbonic acid readily betrays its presence through solutions of the alkaline earths such as baryta and chalk, in which its passage produces an insoluble carbonate, and consequently makes the liquid turbid. Scientific American Supplement, No. 460, October 25, 1884 Boiling with dilute mineral acids, or baryta water, decomposes albumins into carbon dioxide, ammonia and fatty amino- and other acids. The Project Gutenberg Encyclopedia Volume 1 of 28 Spread paper with muriate of ammonia or baryta and you obtain a range of colors nearly corresponding with the natural hues of the prismatic spectrum. History and Practice of the Art of Photography The chromates are often mixed with sulphate of lead, as well as with the sulphates of baryta and lime. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The liquid must be filtered while hot, and as it cools the hydrate of baryta appears in crystals. 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 Finally, Mr. Wolpert rightly sees one serious drawback to the use of baryta in an apparatus that has to be employed in schools, among children, and that is that this substance is poisonous. Scientific American Supplement, No. 460, October 25, 1884 As the coloring-matter of archil is not precipitated by baryta and magnesia, but changed to a purple, the baryta method, recommended by Pasteur, Balard, and Wurtz, and the magnesia test, are useless. Scientific American Supplement, No. 385, May 19, 1883 It is advantageous to add to the wash water powdered carbonate of baryta, strontia, magnesia, or preferably lime, and subsequently to rinse in pure water. Scientific American Supplement, No. 401, September 8, 1883 Or chromate of baryta, is exceedingly difficult to make well. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The hydrate of baryta melts by a low red heat without losing its water of hydration. 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 filtrate is heated to a boil, and mixed with ammonia and ammonium carbonate, to precipitate the excess of baryta in solution. Scientific American Supplement, No. 362, December 9, 1882 The baryta water used is titrated before and after the operation, and from the difference is calculated the quantity of carbonate formed, and hence of the carbonic acid. Scientific American Supplement, No. 358, November 11, 1882 It is obtained by treating a solution of permanganate of baryta with sulphuric acid, when sulphate of baryta falls, and the permanganic acid remains dissolved in the water. Scientific American Supplement, No. 401, September 8, 1883 Produced by adding aqueous ferrate of potash to an excess of dilute solutions of baryta salts, has been described as carmine-coloured and permanent. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The hydrate of baryta combines with the silicic acid, and forms the super-basic silicate of baryta, while the oxides become free. 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 Through the other opening passes a glass tube bent at an acute angle and connected by a short rubber tube to an adjoining flask, two-thirds filled with decinormal baryta solutions. Scientific American Supplement, No. 324, March 18, 1882 The carbonic acid is absorbed by baryta water in three bulb apparatus. Scientific American Supplement, No. 358, November 11, 1882 Lime or baryta and its compounds demand a solution of glauber salts or of sulphuric acid. American Woman's Home The aqueous extract, freed from the pectin which it contains, yields with baryta- and lime-water yellow precipitates, from which acids separate the colouring matter of a vermilion hue. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The presence of baryta destroys the reaction of the strontia, the flame presenting the light green color of the baryta. 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 Carbonic acid is evolved, and, passing into the adjoining flask, is absorbed by the baryta, precipitating it as carbonate. Scientific American Supplement, No. 324, March 18, 1882 The sulphate of baryta colors the flame green when heated at the point of the reduction flame. 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 But neither the sulphate, carbonate, nor, in fact, any other salt of baryta, gives such a fine green color as the chloride. 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 With us, at least, tungstate of baryta is far from having the body of white lead, and indeed is inferior in opacity to good zinc white. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Strontia or its compounds produce with borax, or microcosmic salt, the same reactions as baryta. 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 III. and sesqui. iron are separated by agitation with baryta carbonate, some chloride of ammonia being added to prevent nickel and cobalt precipitation traces, and filtering. Scientific American Supplement, No. 324, March 18, 1882 In the pure state, baryta is of a greyish-white color, presents an earthy appearance, and is easily powdered. 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 Salts of baryta, formed with most acids, are insoluble in water; for instance, the salts with sulphuric, carbonic, arsenic, phosphoric, and boracic acids. 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 salts of baryta, soluble in water, are decomposed by ignition, except the chloride. 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 With still more water it forms a crystalline mass, the hydrate of baryta, which is completely soluble in hot water. 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 From sulphur or iodine, by decomposing with sulphuric acid and separating this with baryta chloride. Scientific American Supplement, No. 324, March 18, 1882 The presence of strontia, lime, or magnesia, does not suppress the reaction of the baryta, unless they greatly predominate. 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 Borax dissolves baryta and its compounds with a hissing noise, as well in the flame of oxidation as in that of reduction. 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 presence of baryta or soda prevents this reaction. 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 Mix one part of the substance with about four parts of the hydrate of baryta, and expose it to the blowpipe flame. 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 This is what distinguishes lime from baryta and strontia, and is a good method of separating the former from the latter. 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 This color will not be mistaken for those of boracic acid, copper, or baryta. 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 presence of baryta communicates a green color to the flame. 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 hydrate of lime is far less soluble in water than either those of baryta or strontia, and is less soluble in hot water than in cold. 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 |
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