Du Pont farmer's handbook; instructions in the use of dynamite for clearing land, planting and cultivating trees, drainage, ditching and subsoiling . 1. BORING THE HOLES FOR A DITCH. 2. THE BLAST DITCHING WITH DYNAMITE should be charged with two cartridges each and the last cartridgeloaded in the middle hole should be primed with a blasting cap,carefully crimped to the proper length of waterproof fuse. No tamp-ing is required. Just as soon as the primer is in position everybodyshould be warned off the ditch and the fuse lighted, the blaster, ofcourse, retiring to a safe distance. The charge m
Du Pont farmer's handbook; instructions in the use of dynamite for clearing land, planting and cultivating trees, drainage, ditching and subsoiling . 1. BORING THE HOLES FOR A DITCH. 2. THE BLAST DITCHING WITH DYNAMITE should be charged with two cartridges each and the last cartridgeloaded in the middle hole should be primed with a blasting cap,carefully crimped to the proper length of waterproof fuse. No tamp-ing is required. Just as soon as the primer is in position everybodyshould be warned off the ditch and the fuse lighted, the blaster, ofcourse, retiring to a safe distance. The charge m the middle holeexplodes those in the holes on either side and the effect of these twois carried to the next ones and so on almost instantaneously to theopposite ends at the ditch. In this way ditches can be dug up toseven feet wide at the top, three and a half feet wide at the bottomand four feet deep, the width and depth depending on the depth anddistance apart of the holes, whether each charge consists of one-half,three-quarters or one cartridge and the kind of soil and how wet it weather also checks the action of the dynamite and it is neces-sary to use larger char
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Keywords: ., bookcentury1900, bookdecade1910, bookiddup, booksubjectexplosives
