Du Pont farmer's handbook; instructions in the use of dynamite for clearing land, planting and cultivating trees, drainage, ditching and subsoiling . olid oak log ten feetlong and four feet in diameter, tw o or two and a half P/^ x 8 inchcartridges of Red Cross 40% Extra Dynamite are exploded in ahole drilled halfway through the log, midway between the ends. Thiswill sometimes split the log in quarters if the charge is properly con-fined with tamping. Only about half as much dynamite is requiredto split a poplar log of this size. A two-foot pine log twenty feetlong can be split in halves with
Du Pont farmer's handbook; instructions in the use of dynamite for clearing land, planting and cultivating trees, drainage, ditching and subsoiling . olid oak log ten feetlong and four feet in diameter, tw o or two and a half P/^ x 8 inchcartridges of Red Cross 40% Extra Dynamite are exploded in ahole drilled halfway through the log, midway between the ends. Thiswill sometimes split the log in quarters if the charge is properly con-fined with tamping. Only about half as much dynamite is requiredto split a poplar log of this size. A two-foot pine log twenty feetlong can be split in halves with a single P/^ x 8 inch cartridge orless of Red Cross 40 r Extra Dynamite exploded as described above. BOULDER BLASTING There are three ways in which boulders can be blasted. Theseare known as Mudcapping, Snakeholing and Blockholing. Mudcapping and Snakeholing are the easier and quickermethods, but require more dynamite. It is almost impossible toshatter large round boulders of hard rock by either of these methods,without using an excessive quantity of explosives. See pages 1 1 to 16for proper methods of priming, charging, tamping and firing. 44. THE MUDCAP IN POSITION
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Keywords: ., bookcentury1900, bookdecade1910, bookiddup, booksubjectexplosives
