. Improving crop yields by the use of dynamite . f dynamite can be handled before it is necessary to destroy thegloves. 92 EXPLOSIVES AND BLASTING SUPPLIES BLASTING SUPPLIES When detonating high explosives with fuse and blasting caps,the only supplies necessary besides the fuse and blasting caps, andthe tools for making the hole and for tamping, are the cap crimperand the thawing kettle. The latter has been described under theparagraph on * Thawing, page 87. When the blasting is done by electricity, a blasting machine,coil of leading wire and electric fuzes take the place of fuse andblasting c
. Improving crop yields by the use of dynamite . f dynamite can be handled before it is necessary to destroy thegloves. 92 EXPLOSIVES AND BLASTING SUPPLIES BLASTING SUPPLIES When detonating high explosives with fuse and blasting caps,the only supplies necessary besides the fuse and blasting caps, andthe tools for making the hole and for tamping, are the cap crimperand the thawing kettle. The latter has been described under theparagraph on * Thawing, page 87. When the blasting is done by electricity, a blasting machine,coil of leading wire and electric fuzes take the place of fuse andblasting caps. A spool of connecting wire and roll of insulating tapeshould also be provided. A leading wire reel is not a necessity, butsaves time and keeps the leading wire in good condition. Fuse Fuse is made in several different grades, put up in double coils,consisting of two single coils of 50 feet each, and packed in casescontaining from 500 to 6000 feet. In wet work, double-tape or * triple-tape * fuse should be used, while ** single-tape or cot-. FUSE ton will answer in dry work. Fuse should be stored in a cool,dry place to keep it from hardening so that it will break when it isunrolled, or from getting soft and defective. In cold weather fusebecomes stiff and must be unrolled very carefully to keep it frombreaking. Most fuse burns from two to three feet per minute. Blasting Caps Blasting caps are small copper cylinders closed at one end,which contain a sensitive and highly explosive compound. Theymust always be handled carefully, kept away from heat or sparks,and must not be subjected to heavy knocks or jars. They shouldnever be carried loose in the pocket, nor permitted to lie about wherechildren may find them. They are very dangerous in the hands ofa child or irresponsible person. They should never be stored or 98 HANDBOOK OF EXPLOSIVES carried with dynamite, because they are more easily exploded byaccident than is dynamite, and if they explode in close proximityto dynamite t
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