Du Pont farmer's handbook; instructions in the use of dynamite for clearing land, planting and cultivating trees, drainage, ditching and subsoiling . w wet it weather also checks the action of the dynamite and it is neces-sary to use larger charges and put the holes closer together then thanin warm weather. It is also necessary to use heavier charges and putthem closer together when the ground is only moderately wet andheavy. For ditches with a width at the top of from eight to fourteenfeet, two rows of holes are necessary, all of the holes in both rowsbeing pointed at an angle of 45 t
Du Pont farmer's handbook; instructions in the use of dynamite for clearing land, planting and cultivating trees, drainage, ditching and subsoiling . w wet it weather also checks the action of the dynamite and it is neces-sary to use larger charges and put the holes closer together then thanin warm weather. It is also necessary to use heavier charges and putthem closer together when the ground is only moderately wet andheavy. For ditches with a width at the top of from eight to fourteenfeet, two rows of holes are necessary, all of the holes in both rowsbeing pointed at an angle of 45 to 70 degrees toward the same sideof the ditch. The holes should be the same distance apart in therows, the same depth and charged with the same quantity and kindof dynamite as for the narrower ditches. The rows should be spacedas follows: TOP WIDTH OF DITCH DISTANCE BETWEEN TWOROWS OF HOLES 8 ft. 30 In. 10 ft. 36 in. 12 ft. 42 in. 14 ft. 48 in. Ditches from sixteen to twenty feet wide require three rows ofholes with three to four feet between the rows and the holes the samedistance apart in the rows as with the narrow ditches. In these wide 50. 3. A MOMENT AFTER THE BLAST
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Keywords: ., bookcentury1900, bookdecade1910, bookiddup, booksubjectexplosives
