Identifier: explosives01mars (find matches)
Title: Explosives
Year: 1917 (1910s)
Authors: Marshall, Arthur, 1873-
Subjects: Explosives
Publisher: Philadelphia, P. Blakiston, 1917
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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the works the principle is adopted of mixing it with asolid substance at as early a stage as possible, bo that the quantity of liquidnitro-glycerine is reduced to a minimum, but until it has been fully washedand mixed, it must of course be conveyed from one house to another in theliquid state. This is sometimes done in closed trucks or trolley- I g. 48). 1 Eastern Dynamite Co.. Or. lat. 181,489; C. L Reese, Am. Pat. 804,817. 2 Eng. Pat. 14,586, of June 12, 1912 ; • ■• rm. Pat. 283,330, of Od >ber 10, 1912. MANUFACTURE OF NITRO-GLYCERINE 227 In Germany the tendency is to revert to trolleys on account of the dangerof explosions being communicated from one house to another by guttersor pipes. Where small quantities only have to be transferred, as from theafter-separating and wash-water-settling houses to the washing house, coveredbuckets of indiar-ubber, gutta-percha, or papier mache are used, and theseare carried in the hand. In England the bulk of the nitro-glycerine is, how-
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Fig. 48. Truck for Conveyance of Liquid Nitro-glycerine, Repauno, U.S.A.(By permission of E. J. du Pont de Nemours Co.) ever, caused to run from one house to another through open gutters, which Gutters,are usually made of lead. Pipes are not suitable on account of the impossi-bility of inspecting or cleaning them properly. All wash-waters are alsosent down open gutters to the wash-water-settling house, as they carry globulesof nitro-glycerine. The fall of the gutters should not be less than about 1in 65 : they should be free from sharp turns and from all inequalities in whichnitro-glycerine can lodge. At the Royal Gunpowder Factory they are joinedby butt-welding, as this gives a much smoother surface than lap-welding. Inorder to prevent the nitro-glycerine from freezing in cold weather, the gutter 22 s EXPLOSIVES connecting the nitrating house with the washing house is provided with an outer jacket (■(( section in Fig. 43), and warm water is circulated in this whenthe outside temper

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