Note 8 — Chapter I · NOMENCLATURE AND THEORY.
Reading edition
From the unpublished records of three experimental mines fired at Willet’s Point in 1877-83 it would seem that the quantities given in this table are greater than those required if good American powder is used. These mines, in a soil of modified drift, used. These mines, in a soil of modified drift, with a L. L. R. of 12 ft. required 1.02 lbs. per cu. yd. = 1 lb. ⅓ oz.; and with a L. L. R. of 17 ft. required 1.15 lbs. per cu. yd. = 1 lb. 2½ oz.