| 单词 | illuminant |
| 例句 | A fixture even more than a star, either way an illuminant. Cicely Tyson Kept It Together So We Didn’t Fall Apart 2021-01-29T05:00:00Z Lighthouse illuminants changed dramatically over time, running the gamut from whale, lard and vegetable oil to kerosene, acetylene and finally electricity. How Lighthouses Changed American History 2016-09-14T04:00:00Z The airy, brick-lined museum calls attention to their historic magnitude, feats of engineering and the inventors who perfected illuminants and optics. Two Good Reasons to Visit St. George: The National Lighthouse Museum and Sri Lankan Food 2015-07-24T04:00:00Z This lovely illuminant contrivance is perhaps symbolic of that golden age.” Designer Unveils Wooden Light Bulb 2012-05-29T19:05:18Z If the gilds forbade the carrying on of a craft by night, it was because the dim gloom of ancient illuminants meant bad work, and not because protracted toil made unhealthy workmen. Boy Labour and Apprenticeship 2012-03-30T02:00:18.807Z Of all the experiments which may be performed with rapidly alternating currents the most interesting are those which concern the production of a practical illuminant. 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 The fire is the sole illuminant of the room. A Safety Match 2012-03-19T02:00:23.817Z The lights of San Remo looked very alluring to him, who had for so long spent his nights at sea with no more companionable illuminant than a reeking kerosene lamp or the cold, aloof stars. The White Blackbird 2012-03-10T03:00:15.513Z During that distant era when no chandelier hung over the heads of Members, the only illuminants known in the Chamber were candles. Social Transformations of the Victorian Age A Survey of Court and Country 2012-02-29T03:00:22.540Z Petroleum has been used to some extent both as a fuel and as an illuminant. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z In the course of this experimental study special attention was devoted to the heating effects produced by these currents, which are not only striking, but open up the possibility of producing a more efficient illuminant. 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 Each new female illuminant was welcomed with thankful, greedy eyes. Gargoyles 2012-01-05T03:00:27.063Z A lamp was banged into the roof of my carriage, half an inch of orange flame, poised in a large glass globe, like a gold-fish, and of about as much use as an illuminant. Further Experiences of an Irish R.M. 2011-11-24T03:00:44.527Z When petroleum began to be used as an illuminant it is impossible to say. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z Kerosene was the dominant illuminant fuel for a few decades between the decline of whale oil and the rise of electricity. The Social Graph as Crude Oil (Go Ahead, Build that YASN!) 2011-10-21T20:33:13Z Also that as an illuminant, I was long familiar only with the use of oil, shedding its feeble light, p. 119this being superseded by the gas derived from coal. Addresses & Papers / Collectanea 2011-08-04T02:00:22.097Z Coal oil and electricity have since been found better illuminants for this purpose. Inventions in the Century 2011-07-20T02:00:14.643Z It is better to perform this experiment under artificial light, in order that the spectral character of the illuminant may be certain to remain constant. Visual Illusions Their Causes, Characteristics and Applications 2011-06-02T02:00:25.247Z The most powerful search-light can in no way compare with daylight as an illuminant, and, like all other mechanical contrivances, they have certain marked drawbacks in war. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 "Foraminifera" to "Fox, Edward" 2011-04-22T02:00:08.637Z When a substitute was needed for sperm oil, after almost numberless experiments, he showed that lard oil is the best illuminant, thereby saving the country over one hundred thousand dollars yearly, since 1865. Famous Men of Science 2011-03-08T03:00:49.717Z The various improvements in electric illuminants, such as the Nernst oxide lamp, the tantalum and osmium incandescent lamps, and improved forms of arc lamp, enclosed, inverted and flame arcs, are described under Lighting: Electric. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z It is largely used as an illuminant and for the production of great heat. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide These methods entail the use of acetylene under pressure, and are so analogous to limelight that I shall for convenience deal with them in the chapter devoted to that illuminant. Optical Projection Part 1: Projection of Lantern Slides In remote barrios it is still in general use as a street illuminant, and so perfect is its combustion that under a constant flicker it emits little or no smoke. The Cocoanut With reference to its products and cultivation in the Philippines Even after gas had come into general use as a street illuminant, it must have found its way but slowly into private houses. Coal and What We Get from It But that was impossible, for there was no illuminant of the nature nearer than Tilborough, the Denes being lit up by crystal oil. Sir Hilton's Sin The Boulder district developed very rapidly after 1902; its product is a high-grade illuminant with paraffin base. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" The same arrangement must be used with other illuminants, such as oil, only in this case the lanterns must be mounted side by side, on account of the tall chimneys. Optical Projection Part 1: Projection of Lantern Slides Nevertheless, the electric light is the illuminant to be coveted. The Turkish Bath Its Design and Construction It will not then be only a struggle between the two illuminants, but it will be a question of electricity versus gas, plus tar and ammonia. Coal and What We Get from It Thomaz re-entered, lit candles stuck in empty bottles, and, with a bow, placed one of these crude illuminants at the door of each of the strangers. The Pathless Trail The illuminant is most commonly an oil-lamp, or an acetylene gas jet, or a cylinder of lime heated to intense luminosity by an oxy-hydrogen flame. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The whole question of optical adjustments has, however, been left over for a future chapter, as it more or less applies to whatever illuminant is used. Optical Projection Part 1: Projection of Lantern Slides Oil, gas, electricity, as illuminants, are a familiar example of this relationship. The Evolution of Modern Capitalism A Study of Machine Production Acetylene and petrol are better illuminants than paraffin for working on machines by night. The War in the Air; Vol. 1 The Part played in the Great War by the Royal Air Force Microscope Illuminant.—In tropical and subtropical regions diffuse daylight is the best illuminant. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. It is very difficult to select practical artificial illuminants, because of the various color properties possessed by each. Color Value It is not the intention of the author to give precise working instruction for all and every variety of the above illuminants as manufactured by different firms. Optical Projection Part 1: Projection of Lantern Slides Certain subsidiary influences, however, also deserve notice, especially the introduction of cheap illuminants. The Evolution of Modern Capitalism A Study of Machine Production Whale oil, crude turpentine, kerosene, and gas have been used each in turn for illuminants; what is the advantage of each over the preceding? Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges The form of light-box presupposes the choice of illuminant, and in this there is a wide range. 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 Deep, full colors are less affected by the shadings in artificial illuminants than lighter tones of the same color. Color Value S represents our glass slide of 3 inches clear diameter, R the radiant or illuminant, and L our objective, shown here for the sake of simplicity as a single lens. Optical Projection Part 1: Projection of Lantern Slides This was done, and the astonished professor found that here was an oil, whose source he could only guess, which made a splendid illuminant and which also seemed to have some medicinal properties. American Men of Mind It did not show us much, though, the darkness being too great for such a feeble illuminant to penetrate far into it. The Island Treasure For the illuminant used in enlarging, we may employ either daylight or artificial light. 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 So if gas be the illuminant in your study, see to it that no volume of yours be above the level of the burner. The Book-Hunter at Home Having fixed the position of the lantern, it should be got into place, the cable or tubing connected or whatever else is necessary, according to the illuminant to be used. Optical Projection Part 1: Projection of Lantern Slides What on earth can we be searching for when the "candle of the Lord," as Locke called it, is the very illuminant we must employ in our search? Morality as a Religion An exposition of some first principles Gas was introduced into London about the year 1812 and was thought a prodigiously “brilliant illuminant.” Pickwickian Manners and Customs An antique lamp, wherein rested what appeared to be a small ball of light, unlike any illuminant he had seen, stood upon a massive table, which was littered with papers. The Sins of Séverac Bablon Doubtless when he comes to praise and blame, the political historian must make due allowance for his actors; and charity is the grandest of illuminants. The Life of William Ewart Gladstone, Vol. 1 (of 3) 1809-1859 Paraffin-oil is the poorest of all present-day forms of lantern illuminants. Optical Projection Part 1: Projection of Lantern Slides When made for illuminating purposes it must be enriched, that is, illuminants must be added, since both carbon monoxide and hydrogen burn with non-luminous flames. An Elementary Study of Chemistry Linseed-oil is generally exported, but if used at home it is mainly as an illuminant. The Tribes and Castes of the Central Provinces of India - Volume IV of IV Kumhar-Yemkala This torch is a good and economical illuminant. The Manóbos of Mindanáo Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir The street cars moving in the English coast cities must, of course, be lighted and the streets must have some illuminant; but the railroad carriages, hotels, and private houses must draw their curtains. The Audacious War Wounds are treated effectively and water is sterilized by the ultraviolet radiant energy in modern artificial illuminants. Artificial Light Its Influence upon Civilization No person shall use in any mine any other illuminant than those provided for in sections 974 and 974-1 of the General Code, unless with the consent of the chief inspector of mines. Mining Laws of Ohio, 1921 Gas has its virtues as an illuminant also, and is favored by many on account of the softness of the light. The Complete Home Our next step was to see this wonderful illuminant for night work, and in the course of our wandering's we came across a large fort from which searchlights had been showing the previous night. My Adventures as a Spy Showing that, if the Russian oil is a little lower in illuminants, it quite makes up by extra volume, but it seemed to me to deposit a much larger proportion of carbon. Scientific American Supplement, No. 794, March 21, 1891 Mineral oil was introduced as an illuminant in 1853, and the modern lamp came into use. Artificial Light Its Influence upon Civilization It has been reported that, in view of the necessity for restricting the consumption of artificial illuminant, the authorities propose drastically to curtail the duration of theatrical entertainments. Punch, or the London Charivari, Volume 152, May 9, 1917 While we are wondering that we are alive in the face of such dreadful facts, we may note further that gas is rather variable in its qualities as an illuminant. The Complete Home My candle, guttering wildly in the unaccustomed breeze blowing dankly through the chamber, was the sole illuminant. The Man with the Clubfoot But even should a huge monopoly be created, I think I have found a source of light at home which will hold its own against any foreign illuminant in the market. Scientific American Supplement, No. 794, March 21, 1891 Although in lighting little use has been made of the injection of chemical salts into ordinary flames, it appears certain that such developments would have risen if electric illuminants had not entered the field. Artificial Light Its Influence upon Civilization For the illuminant we may select any good acetylene cycle lamp. Things To Make Recently, however, an electric-light company was organized in that city, and this brilliant illuminant was introduced not only into the streets and stores, but into many private houses. Evolution Of The Japanese, Social And Psychic Of these latter was Jean Parisot de la Valette; in him the pure flame of religious enthusiasm burnt with so clear a light as to act as an illuminant for the paths of others. Sea-Wolves of the Mediterranean At the dividing-line, where the path parted to the men's and to the ladies' dressing-rooms, he perceived a ghostly figure in the obscurity which also prevailed here from the general extinction of the illuminant. The Son of Clemenceau Of course, no illuminants are available which approach this theoretical ideal and it is not likely that this would be a practical ideal. Artificial Light Its Influence upon Civilization Think we as we may, of all the possible directions to develop a practical illuminant, the line of high vacua seems to be the most promising at present. Experiments with Alternate Currents of High Potential and High Frequency Moreover, the amount of water vapor given off during the combustion of gas is greater than in the case of the other illuminants. Scientific American Supplement, No. 795, March 28, 1891 The most common illuminant consists of grease candles, supported on high candlesticks, of wood or brass, but sometimes oil cup-lamps are found, like those we use for night-lights. Corea or Cho-sen The Land of the Morning Calm These illuminants, however, constitute but about 6 per cent. of the whole. The Story of a Piece of Coal What It Is, Whence It Comes, and Whither It Goes This should be obvious when it is considered that an object which is red under an illuminant containing all colors such as sunlight would be black or dark gray under monochromatic yellow-green light. Artificial Light Its Influence upon Civilization But not only as an illuminant is it being brought into direct competition with gas, but also as a fuel and for cooking purposes, as well as for motive power. Scientific American Supplement, No. 601, July 9, 1887 It will then be mixed with the gas from the retorts, and will supply a far higher illuminant than we at present possess. Scientific American Supplement, No. 795, March 28, 1891 Some self-constituted prophets shook their heads and said that before the gas debt was paid off gas would literally have "gone out" as a general illuminant. A Tale of One City: the New Birmingham Papers Reprinted from the "Midland Counties Herald" A favourite form of illumination I came across was a lamp made out of an empty tobacco tin, rifle oil for the illuminant, and a bit of a shirt for a wick! Bullets & Billets The red under present conditions is kept alive by contrast with other colors, because the latter live by virtue of the fact that most of our present illuminants contain their hues. Artificial Light Its Influence upon Civilization As time passed, and the new illuminant was backward in appearing, the shares recovered their old value. Heroes of the Telegraph Edison had perfect confidence in his meters, and also in the ultimate judgment of the public as to the superiority of the incandescent electric light as against other illuminants. Edison, His Life and Inventions No patient was seriously or permanently injured, and none was in a person who used the electric light in a proper manner as an illuminant. Anomalies and Curiosities of Medicine It is possible that he may have there derived, from his experiments, the first idea of Gas as an illuminant. Men of Invention and Industry Perhaps the ideal illuminant, which is most generally satisfactory for general activities, is a white light corresponding to noon sunlight. Artificial Light Its Influence upon Civilization It is used as an illuminant and lubricant. The Gutenberg Webster's Unabridged Dictionary Section P and Q It is not surprising, therefore, that in September of that year, when Edison turned his thoughts actively toward electric lighting by incandescence, his early experiments should be in the line of carbon as an illuminant. Edison, His Life and Inventions The author says: My invention relates to an improvement in phosphorescent illuminants. Scientific American Supplement, No. 497, July 11, 1885 The superiority of acetylene in respect of brilliancy and portability will at once suggest its employment as the illuminant in the "light" moth-traps which entomologists use for entrapping moths. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power If this is chosen as the scientific ideal, the illuminants of the present time are much more "efficient" than if the most efficient light is the ideal. Artificial Light Its Influence upon Civilization Acetylene gives a light which is nearest to sunlight of any artificial illuminant. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon Moreover, just about the time that Edison took up incandescent lighting, water-gas was being introduced on a large scale as a commercial illuminant that could be produced at a much lower cost than coal-gas. Edison, His Life and Inventions Remembering the unprogressive character of Chinese arts and industries, there is ground for the belief that they may have been using this natural gas as an illuminant these hundreds of years. Scientific American Supplement, No. 497, July 11, 1885 By far the most important chemical reactions of acetylene in connexion with its use as an illuminant or fuel are those which it undergoes with certain metals, notably copper. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Modern illuminants have luminous efficiencies ranging from 5 to 30 lumens per watt, so it is seen that much is to be done before the limiting efficiencies are reached. Artificial Light Its Influence upon Civilization We are no longer regarded as being ourselves illuminants, but simply as being the stands on which the light is placed. Expositions of Holy Scripture For more than thirty years the arc light remained an expensive laboratory experiment; but the coming of the dynamo placed that illuminant on a commercial basis. Edison, His Life and Inventions Modern Society, or some such illuminant of the upper circles, and a cheap fashion paper, appear at irregular intervals to supplement this literature. Mankind in the Making The product, it will be seen, had lost almost exactly 50 per cent. of its value as an illuminant, owing to the excessive heating to which it had been, exposed. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Although gas-lighting has affected the activities of mankind considerably by intensifying commerce and industry and by advancing social progress, the illuminants which eventually took the lead have extended the possibilities and influences of artificial light. Artificial Light Its Influence upon Civilization Of all artificial illuminants yet employed, the arc and the incandescent electric lights are unquestionably the best, whether from a sanitary, aesthetic, or truest economical standpoint. Beacon Lights of History, Volume 14 The New Era; A Supplementary Volume, by Recent Writers, as Set Forth in the Preface and Table of Contents Paraffin had from the first been suggested as the most Page 81 suitable illuminant, its main disadvantage being that it is not a desirable oil to carry in quantities in a ship. The Voyages of Captain Scott : Retold from the Voyage of the Discovery and Scott's Last Expedition There is some prospect of the luminosity excited in a vacuum tube by the alternating currents from a dynamo or an induction coil becoming an illuminant. The Story of Electricity At the prevailing prices in most parts of Britain, simple oil-gas is slightly cheaper, but an appreciable rise in the price of gas- oil would render the mixture with acetylene the cheaper illuminant. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The modern illuminants have been developed so recently that the new possibilities have not yet been established. Artificial Light Its Influence upon Civilization These valuable illuminants and fuels are considered here because, although they are found in traces in older strata, it is in the Ordovician that they occur for the first time in large quantities. The Elements of Geology Not unless it was lit like other cities!" she said, smiling—"I suppose if such a city existed, its inhabitants would need some sort of illuminant—they would not grope about in the dark. The Secret Power Only the most prosperous business houses and homes had even this expensive illumination; most obtained their artificial light from the new illuminant known as kerosene. The Age of Big Business; a chronicle of the captains of industry Though convenient, the phrase is a mere convention, for all artificial illuminants, even including the electric light, which exhibit a useful degree of intensity depend on the same principle of incandescence. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Although two illuminants may be of the same luminous intensity, they may differ widely in actinic value. Artificial Light Its Influence upon Civilization This calcium carbide is the basis of acetylene gas, a powerful illuminant, and it is widely used in metallurgy, for welding and other purposes. The Age of Invention : a chronicle of mechanical conquest And now a large part of the American people must begin to enrich the Rockefellers as soon as the sun goes down, no matter what form of illuminant they use. The Iron Heel Though petroleum was not unknown, millions of American households were still burning candles, whale oil, and other illuminants. The Age of Big Business; a chronicle of the captains of industry Hence, where facilities for transport or storage are bad or costly, acetylene may be the most convenient or cheapest illuminant, notwithstanding its relatively high cost in many other cases. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Therefore, one illuminant may be superior to another for one photochemical reaction, while the reverse may be true in the case of another reaction. Artificial Light Its Influence upon Civilization The excellence of marine illuminants and fog signals today is largely due to his efforts. The Age of Invention : a chronicle of mechanical conquest All modern illuminants emit radiant energy, which does not affect the ordinary photographic plate. Artificial Light Its Influence upon Civilization For the uncolored illuminants the range in nautical miles appears to be at least equal to the square root of the candle-power. Artificial Light Its Influence upon Civilization Likewise where storage accommodation is limited, as in vehicles or in ships or lighthouses, calcium carbide may be preferable to oil or other illuminants as a source of light. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power In general, it may be said that the arc-lamps including the mercury-arcs provide the most active illuminants for photochemical processes; however, a large number of electric incandescent filament lamps are used in photographic work. Artificial Light Its Influence upon Civilization Obviously, the colors generally appear different when another illuminant is used. Artificial Light Its Influence upon Civilization It is impossible to rate the different illuminants in a general manner as to actinic value because the various photochemical reactions are not affected to the same extent by rays of a given wave-length. Artificial Light Its Influence upon Civilization The nearer ultra-violet rays are found in sunlight and in most artificial illuminants and are transmitted by ordinary glass. Artificial Light Its Influence upon Civilization The light of the acetylene flame has, however, some intrinsic advantages over the light of other artificial illuminants. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The flame-arcs afford a means of obtaining a variety of illuminants differing in spectral character or color. Artificial Light Its Influence upon Civilization Doubtless the future will see the production of efficient light of many qualities or colors, but to-day many of the demands must be met by modifying the artificial illuminants which are available. Artificial Light Its Influence upon Civilization In quality or spectral character, the unmodified illuminants used for general lighting purposes differ from daylight and therefore do not fully replace it. Artificial Light Its Influence upon Civilization Noon sunlight contains all the spectral colors in approximately the same proportions, but this is not true of these artificial illuminants. Artificial Light Its Influence upon Civilization Hence in confined, ill-ventilated, or crowded rooms, the air will suffer less exhaustion, and accordingly be better for breathing, if acetylene is chosen rather than any other illuminant, except electricity. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power All these illuminants were of a warm yellow color. Artificial Light Its Influence upon Civilization The "vacuum" tube affords a possibility of an extensive variety of illuminants differing widely in spectral character or color. Artificial Light Its Influence upon Civilization By varying the gas a variety of illuminants can be obtained, but this means of light-production has not been developed to a sufficiently practicable state to be satisfactory for general lighting. Artificial Light Its Influence upon Civilization By using various substances besides carbon for the electrodes, illuminants differing in spectral character can be obtained. Artificial Light Its Influence upon Civilization This higher light-yielding capacity of calcium carbide, ready to be developed through acetylene, gives the latter gas a great advantage over all other illuminants in respect of compactness for transport or storage. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The psychological effect of warmth and cheerfulness due to such illuminants or colors is well established. Artificial Light Its Influence upon Civilization Old illuminants such as that emitted by the candle and oil-lamp were used for centuries in interiors. Artificial Light Its Influence upon Civilization An illuminant of this character can be obtained efficiently by using a properly tinted bulb on tungsten filament lamps. Artificial Light Its Influence upon Civilization Of course, the ideal solution is to make the colored light directly at the light-source, and doubtless future developments which now appear remote or even impossible will supply such colored illuminants. Artificial Light Its Influence upon Civilization The amount of heat developed by the combustion of acetylene also is less for a given yield of light than that developed by most other illuminants. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Some persons are still using the carbon-filament lamp despite its low efficiency, because they desire to retain the warmth of tint of the older illuminants. Artificial Light Its Influence upon Civilization In connexion with the smaller amount of heat developed per unit of light when acetylene is the illuminant, the frequently exaggerated claim that acetylene does not blacken ceilings at all may be studied. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The more important advantages of acetylene as an illuminant have now been indicated, and it remains to discuss the cost of acetylene lighting in comparison with other modes of procuring artificial light. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The illuminant which acetylene is best fitted to supersede on the score of convenience, cleanliness, and hygienic advantages is oil. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power There is one respect in which acetylene and other flame illuminants are superior to electric lighting, viz., that they sterilise a larger volume of air. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Thus the high efficiency of the modern illuminants is utilized to advantage even though their color is maintained the same as the old illuminants. Artificial Light Its Influence upon Civilization But the advent of the incandescent burner has completely changed its position relatively to most other illuminants, and under certain conditions it seems likely to be the most formidable competitor with acetylene. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power |
| 随便看 |
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。