Chemical Technology; Or, Chemistry in Its Applications to the Arts and Manufactures, Volume 1,Deel 4

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H. Baillière, 1865
 

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Pagina 562 - ... and cap it with touch-paper. When these crackers are fired, they will give a report at, every turn of the paper : if you would have a great number of bounces...
Pagina 508 - The slow combustion is made use of when it is required to produce manageable power, as in the case of gunnery. It is plain, therefore, that, if we can explode a large mass instantaneously, we get out of the gases so exploded the greatest possible power, because all the gas is generated before motion commences, and this is the condition of maximum effect.
Pagina 374 - From this mixture, which produced a thick smoke and a loud explosion, proceeded a fierce and obstinate flame, which not only rose in perpendicular ascent, but likewise burnt with equal vehemence in descent or lateral progress...
Pagina 535 - This law rules the practical application of gun-cotton to artillery. A cartridge must not be compact, it must be spread out or expanded to the full room it requires. For this purpose, a hollow space is preserved in the centre of the cartridge by some means or other. The best means is to use a hollow thin wooden tube to form a core ; this tube should be. as long as to leave a sufficient space behind the shot for the gun-cotton. On this long core the simple cotton yarn is wound round like thread on...
Pagina 534 - ... reach of the flame, and keep other combustibles beyond reach, no harm will happen, and no explosion or concussion will result. If you lay a long thread of it round your garden walk at night, disposing it in a waving line with large balls of guncotton thread at intervals, and light one end of the thread, it will form a beautiful firework, the slow lambent flame creeping along with a...
Pagina 537 - Ask gun-cotton to separate a rock already halfseparated, it will refuse to comply with your request. Give it a light burden of earth and open rock to lift, it will fail. If you want it to do the work, you must invent a ruse, — you must make believe that the work is hard, and it will be done. Invent a difficulty and put it between the cotton and its too easy work, and it will do it. The device is amazingly successful. If the cotton have work to do that is light and easy, you provide it with a strong...
Pagina 535 - The third step in mechanical arrangement is to enclose this cord in a close outer skin or coating, made generally of india-rubber cloth, and in this shape it forms a kind of match-line, that will carry fire at a speed of from 20 to 30 feet per second. It is not easy to gather from these changes what is the cause which so completely changes the nature of the raw cotton by mechanical arrangement alone. Why a straight cotton thread should burn with a slow creeping motion when laid out straight^ and...
Pagina 534 - ... yarn is bought and sold like any other article of commerce. This cotton yarn converted into gun-cotton may be called, therefore, the raw material of commerce. In this form it is not at all explosive in the common sense of the word. You may set fire to a hank of it, and it will burn rapidly with a large flame ; but if you yourself keep out of...

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