. Improving crop yields by the use of dynamite . I 00 wI CLEARING THE LAND For blasting large boulders it may be necessary to use a ham-mer and hand drill, unless they are to be broken by mudcappingor by placing the explosive underneath them. The hole under theboulder can be made with a crowbar. If the boulder is drilled,a small tamping stick, from one-half to three-quarters of an inch indiameter should be used. If the charge is put under the boulder,the tamping stick should be one and a half inches in diameter andfive or six feet long. Hardwood tamping sticks are, of course, best,because they
. Improving crop yields by the use of dynamite . I 00 wI CLEARING THE LAND For blasting large boulders it may be necessary to use a ham-mer and hand drill, unless they are to be broken by mudcappingor by placing the explosive underneath them. The hole under theboulder can be made with a crowbar. If the boulder is drilled,a small tamping stick, from one-half to three-quarters of an inch indiameter should be used. If the charge is put under the boulder,the tamping stick should be one and a half inches in diameter andfive or six feet long. Hardwood tamping sticks are, of course, best,because they last ONE MORE OUT OF THE WAY 21
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Keywords: ., bookcentury1900, bookdecade1910, bookidimp, booksubjectexplosives
