. Journal. the shaking of K, there are two levers (Figs. 1 and 2)on either side of the machine, turning around a fixed axisO, provided with counterweights G and connected at theother end hy M. The hoxes also turn round O, and rest-ing upon M, are moved by the levers. By means of aholt D fixed in position by the bent lever W, the cross-liar M can be held down, and the hoxes K and K, beingrendered independent of the weights G, can then be readilyshaken .-W. D. 1!. Improvements in the Manufacture and Application of Explosive Substances. Dingl. Polyt. J. 255, detailed description, with illus
. Journal. the shaking of K, there are two levers (Figs. 1 and 2)on either side of the machine, turning around a fixed axisO, provided with counterweights G and connected at theother end hy M. The hoxes also turn round O, and rest-ing upon M, are moved by the levers. By means of aholt D fixed in position by the bent lever W, the cross-liar M can be held down, and the hoxes K and K, beingrendered independent of the weights G, can then be readilyshaken .-W. D. 1!. Improvements in the Manufacture and Application of Explosive Substances. Dingl. Polyt. J. 255, detailed description, with illustrations, is heregiven of Lauers improvements in his apparatus for sub-. marine blasting with unconliued charges (Gor. Pat30,242, May G, 1SS4 ; see also Journ. Hoc. U/tan. [3], 193). Ballabene prepares a plastic dynamite named lignitehy absorbing from SO to S5 parts of nitroglycerin withfrom 20 to 15 parts of a nitrocellulose obtained by thenitration of wood-Hour. The apparatus shown in theligure is employed for the nitration of the wood. Thevessel A is lined with lead, and has a false bottom con-istin J f two perforated plates, c and b, between whichthere is a layer of gun-cotton. The nitration acids, con-sisting of G2 parts of nitric and 142 parts of sulphuricacid, are introduced into A, d being closed, the wood-Hour immersed therein, the lid a screwed down by </ toform by aid of the washer an air-tight covering, and aftera short space of time d opened and about 50 per cent,of the mixed acids expelled by the introduction of airat 2 atmospheres pressure at/. After a short digestionthe acids are squeezed out as far as possible by the pr
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
