. Improving crop yields by the use of dynamite . BLASTING STUMPS IT IS usually necessary in blasting stumps to place the charge as* close as possible to the toughest part of the stump, so that thepart most difficult to break will be hit first and hardest. Gen-erally this spot will be directly under the middle of the stump, andit is sometimes necessary to bore into the tap root. When a verybig stump is rotten at the middle, but has several large branchingroots, better results will be had if the charge is increased a littleand located deeper in the ground, or if under each of the large rootsa sm
. Improving crop yields by the use of dynamite . BLASTING STUMPS IT IS usually necessary in blasting stumps to place the charge as* close as possible to the toughest part of the stump, so that thepart most difficult to break will be hit first and hardest. Gen-erally this spot will be directly under the middle of the stump, andit is sometimes necessary to bore into the tap root. When a verybig stump is rotten at the middle, but has several large branchingroots, better results will be had if the charge is increased a littleand located deeper in the ground, or if under each of the large rootsa small charge is placed, and all of the charges fired simultaneouslywith a blasting STUMP BOUND WITH CHAIN In order to keep the explosive from splitting the stump, andwasting a part of the force which should be expended in liftingit out, it is the practice of some blasters to wind a stout chain aroundthe stump several times. It is a good idea to use a chain with allhollow stumps. Some large stumps can be effectively removed by explodingsimultaneously charges loaded in holes bored from different sides,so that they will intersect under the center of the stump. Thecartridge containing the detonator (blasting cap or electric fuze) 23
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Keywords: ., bookcentury1900, bookdecade1910, bookidimp, booksubjectexplosives
