Explosives . ving. H the material is in the form of loose fibres, it shouldbe laid on tray-, preferably of copper wire. In either case the racks or traysshould be SO arranged that they are connected electrically to earth, a- drynitro-cellulose is very liable to become electrified, and a spark may set thepowdery material alight. The stoves should not be very near other buildings,a- there i- always a risk of one catching tire. The stove- are generallyconstructed of light material. If the nitro-cellulose be in Loose fibrous form,it may be dried in twenty-four hours, but if it be moulded, it will
Explosives . ving. H the material is in the form of loose fibres, it shouldbe laid on tray-, preferably of copper wire. In either case the racks or traysshould be SO arranged that they are connected electrically to earth, a- drynitro-cellulose is very liable to become electrified, and a spark may set thepowdery material alight. The stoves should not be very near other buildings,a- there i- always a risk of one catching tire. The stove- are generallyconstructed of light material. If the nitro-cellulose be in Loose fibrous form,it may be dried in twenty-four hours, but if it be moulded, it will take severaldays. The greatest care nm-t he exercised not to subject the dry nitro- SLOW-BURNING SMOKELESS POWDERS 291 cellulose to friction or blows, especially if it be still warm. The whole stoveshould be allowed to cool down thoroughly before it is unloaded. In most instances, when an accident lias occurred in a gun-cotton stovethe explosive has merely burnt away extremely fiercely, but without exploding-. Fig. -54. Alcohol Displacement Plant (Maschinenbau Golzern-Grimma) but on March 10 and 28, 1913, severe explosions took place in stoves situatedrespectively at Ardeer, in Scotland, and Pitsea, in In both casesthe stoves were being unloaded, and the presumption is that some of thegun-cotton must have been subjected to blows or friction by the the former case it is supposed that the explosion was brought about byupsetting one of the racks on which the gun-cotton primers were placed. Theexplosion caused three other similar stoves in the neighbourhood to explodealso, with the result that altogether seven men were killed and ten injured. 1 , Nos, 206, 207. 292 EXPLOSIVES The explosion of these other stoves was probably caused by the buildings being shaken and wrecked, and perhaps by the racks being thrown down in them also. Prom this accidenl the deduction may be drawn that these and all other lniililiiiLr- for sensitive explosii should be bo stron
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