machinists and tool shops do not keep them and for the patterns. At least such was the case two years ag when I tried in vain to obtain one. C. H. T. Boston Dec. 17. 1865. put a coil of pipe across the flues in the smoke box so that the heat would act upon it without danger of burning itEDS. Gun Cotton. urged against the use of gun cotton was its liability to decomposition. M. Blondeau in a recent commu nication to the French Academy of Sciences recom mends a compound of gun cotton and ammonia as 'being more stable and less liable to spontaneous decomposition than gun cotton.' He proposes the new name of' pyroxiiic acid' ibr ' pyroxiline' the present name of gun cotton. I have at various times prepared large quantities of gun cotton and have never witnessed this liability to decomposition and am inclined to think that if properly prepared using pure and concentrated acids and very careful and thorough washing it is a stable compound below large masses its formation is not so perfect or uni form throughout the mass and the washing process may not extend to every fiber. pared by myself nearly twenty years since soon after the announcement of Schonbein's discovery. You will find it on trial to lie as good as new although it has been exposed to all the vicissitudes of this cli mate during this long period and for several years of this time in a very damp situation. li is a part of several pounds which I prepared for Capt. Mordecai with which to test its comparative merits with gun that he reported against its use in the Government service on account of its greater explosiveness three or four superposed charges bursting muskets of the best quality. As this condition of charges cannot occur in breech-loaders this objection cannot apply and with all the advantages possessed by this substance over gunpowder it is to be hoped that it may receive turther attention from the Government and also from manufacturers for sporting purposes since breech-loaders are now so much in vog
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machinists, tool shops do, keep, patterns, case two years ag, I tried, vain, obtain, C, H, T, Boston Dec, 17, 1865, coil, pipe across, flues, smoke box, heat, act upon, danger, burning itEDS, Gun Cotton, urged, gun cotton, liability, decomposition, M, Blondeau, recent commu nication, French Academy, Sciences recom mends, compound, gun cotton, ammonia, ', stable, less liable, spontaneous decomposition, gun cotton.', proposes, new name ' pyroxiiic acid' ibr ' pyroxiline', present name, gun cotton, I, various times prepared large quantities, gun cotton, never witnessed, liability, decomposition, am inclined, think, if properly prepared using pure, concentrated acids, careful, thorough washing, stable compound, large masses, formation, perfect, uni form, mass, washing process, extend, every fiber, pared, myself nearly twenty years, soon, announcement, Schonbein' discovery, You will find, trial, lie, good, new although, exposed, vicissitudes, cli mate, long period, several years, time, a, damp situation, li, part, several pounds, I prepared, Capt, Mordecai, test, comparative merits, gun, reported, Government service, account, greater explosiveness three, four superposed charges bursting muskets, best quality, condition, charges cannot occur, breech-loaders, objection cannot apply, advantages possessed, substance, gunpowder, hoped, receive turther attention, Government, manufacturers, sporting purposes, breech-loaders, now, vog, science, scientific, sciences, mind, health, tech, sustainability, publication, lab, sciam, sa, scientist, research, american, experiment, education, discovery, technology, analysis, magazine, u.s., insights, developments, weekly, broadsheet, inventor, innovation, inventions, patented, industrial revolution, emerging, trends, monthly magazine, united states, engravings, curious works, paper, discover, Scientific Paper, Weekly Journal, Practical Information, Art, Science, Mechanics, Chemistry, Manufactures, research, education, scientist, innovation, 19th century, vintage, america, Rufus M. Porter, 1845, journal, academic, newspaper illustrations, retro style, old-fashioned, media illustrations, victorian style, news, newspaperheadline, 19th century style, illustration, journalism
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