| 单词 | lead glass |
| 例句 | The technician stands a few meters away behind a lead-lined door with a lead glass window, reducing her occupational exposure. College Physics for AP Courses 2015-08-12T00:00:00Z They maintained all the historic trim and all of the hand-carved millwork, which was done in Franklin, as well as the lead glass windows. New Hampshire couple to restore mansion built in 1872 2019-09-17T04:00:00Z Perhaps it felt right because of the house’s lead glass windows. New owners plan to restore and preserve historic mansion 2017-02-22T05:00:00Z Televisions and monitors with cathode ray tubes are shrink-wrapped and trucked to a recycler that Tech Dump pays to handle the hazardous lead glass. Ex-convicts get new lease through tech recycling work 2015-12-05T05:00:00Z Shattered lead glass was scattered about the floor. Childhood memories drove train station restoration 2014-09-03T04:00:00Z Yankees players and coaches were taken into Washington Hall, a wondrous mess hall of five-story high beamed ceilings with arched lead glass windows, sharing tables with the cadets for chat sessions before taking the field. Hobbled Yankees draw inspiration from West Point visit 2013-03-31T01:12:59Z In the first case, a soda glass is formed; in the second, a lead glass is the result. British Manufacturing Industries Pottery, Glass and Silicates, Furniture and Woodwork. 2012-02-26T03:00:18.883Z For use with lead glass the supply of air is rather too small, and does not enable one to get such good results. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students The colour of the phosphorescence depends on the kind of glass; thus the light from soda glass is a yellowish green, and that from lead glass blue. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" This bottle, made of English lead glass and therefore an imported article, was unearthed from a grave in the Indian burying ground. Old English Patent Medicines in America I inquired about the windows of your solarium, for ultra-violet light will not pass through a lead glass. Astounding Stories of Super-Science April 1930 The dispersion of the heavy lead glass approaches that of diamond. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public In working with lead glass, therefore, any reduction that occurs should be removed by transferring the glass to the oxidising flame at once. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students For large blow-pipe work with lead glass I recommend a system of four simple blow-pipes, in accordance with the sketch annexed. On Laboratory Arts Chromium produces a green color, which is reddish in lead glass, and yellowish in soda, and potash-lime glasses. Artificial Light Its Influence upon Civilization The composition of the glass seemed to enter into this phosphorescence also, for while lead glass produced blue phosphorescence, soda glass produced a yellowish green. A History of Science — Volume 3 These are not very numerous, and they should be thoroughly mastered in succession, preferably upon tubes of both soda and lead glass. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students Many amateurs find that soda glass is in some respects easier to work with than lead glass. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students This is by no means difficult, but is easier with lead glass than with soda glass. On Laboratory Arts I have found that the larger size, with a powerful bellows, heats large pieces of lead glass very satisfactorily. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students Also, it is best to use hot soda glass for starting cracks in tubes of soda glass, and lead glass for doing so in lead glass tubes. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students Fuller details of the management of lead glass under various circumstances will be found in the subsequent descriptions of operations before the blow-pipe. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students It should only be employed, therefore, when the low melting points of soda or lead glass would render them unsuitable for the purpose to which the finished apparatus is to be put. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students The, work is exposed to this flame until, in the case of lead glass, traces of reduction begin to appear. On Laboratory Arts Lead glass appears to cool more regularly than soda glass, and these precautions may be more safely neglected with apparatus made of lead glass; but not always. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students But, though by special care a joint between lead glass and soda glass, if well made, will often hold together, yet it is never certain that it will do so. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students It is sometimes necessary to join soda glass to lead glass. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students Soda glass may be joined securely to soda glass, especially if the tubes belong to the same batch, and lead glass to lead glass. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students The lead glass should not be heated hot enough to burn, but, short of this, the more fluid it is the better for joints between dissimilar samples. On Laboratory Arts In this case the edge of the lead glass tube may be bordered with white enamel before making the joint. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students I find, however, that when every precaution has been taken, apparatus made of soda glass will bear variations of temperature less well than that made of lead glass. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students The same thing will happen in bending a lead glass tube if it is made too hot in a luminous flame. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students For working lead glass, however, it is quite unnecessary if the directions already given are followed. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students Soda glass can generally be got in rather longer lengths than lead glass; the longer the lengths are the better, for the waste is less. On Laboratory Arts In general, when the soot burns off freely, or lead glass begins to show the faintest sign of reduction, or soda glass begins to colour the flame, it is more than safe to proceed. On Laboratory Arts This remark is more important in the case of soda than of lead glass. On Laboratory Arts I have not noticed this with lead glass well supported. On Laboratory Arts To collect the glass for blowing a bulb of lead glass, employ the flame described on pp. 17-22 for heating lead glass. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students |
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