. Bulletin . especially when distributed through a charge. TESTS WITH DETONATORS DISTRIBUTED IN CHARGE. In some sections where long charges of high explosives have beenused in blasting, it has been the custom to place two or more sep-arated detonators in the charge in the belief that the work accom-plished by the explosive was thereby increased. To test the value ofthis practice rate-of-detonation tests were made with an explosiveof class 1, subclass «°, put up in cartridges 1^ inches in diameter,with and without No. 7 electric detonators distributed in the ex-plosive, in order to determine wh
. Bulletin . especially when distributed through a charge. TESTS WITH DETONATORS DISTRIBUTED IN CHARGE. In some sections where long charges of high explosives have beenused in blasting, it has been the custom to place two or more sep-arated detonators in the charge in the belief that the work accom-plished by the explosive was thereby increased. To test the value ofthis practice rate-of-detonation tests were made with an explosiveof class 1, subclass «°, put up in cartridges 1^ inches in diameter,with and without No. 7 electric detonators distributed in the ex-plosive, in order to determine whether the presence of the detona-tors within the charge would increase the distance through whichdetonation of the charge was effected. The explosive used was sub-sequently tested in cartridges that were 1| inches in diameter, with ° Part of classification by Bureau of Mines. It signifies an ammonium nitrate explo-sive containing a sensitizer that is itself an explosive. BUREAU OF MINES BULLETIN 80 PLATE X. A. RESULTS OF NAIL TESTS OF P. T. S. S. ELECTRIC DETONATORS NOS. 3, 4, 5, 6, 7, AND 8.
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