Show wv i air 7 A 01 ol 6 kv U 0 V Z A A california HERCO BLAST on this highway cut 75 well drill holes ranging in depth from 35 to w wars r loaded with kegs of herco blasting powder seventy seven thousand cu ads of the material broken down required no further handling another cu ads were easily excavated ex ca bated herco powder for Herco blasting ERCO BLASTING the method poured into the hole the finer grains H HERCO of column loading black powder fill the spaces between the larger ones and firing it with cordeau bickford the heavier explosives charge at the which was developed and introduced bottom of the hole thus secured is by the hercules powder co is an an important factor in the success ot established success it has reduced most Herco blasts 1 explosives costs from 20 to 40 at herco powder is sowell al suited for quarries and mines where it has been pocket loading in chambered holes adopted it costs no more than other blasting to secure the best results in her powder blasting co it is necessary to use the write our advertising department powder that gives the most concentrated king street wilmington load herco powder is composed delaware for a free booklet describe de scrib of grains of various sizes when ing Herco blasting HERCULES POWDER COMPACT kan salt lake city utah louisville ky pittsburg allentown W va pa chicago III huntington calif new york city pittsburgh pa san francisco birmingham mo ala denver colo joplin pa barre wilkes Bul buffalo falo N Y duluth minn los m angeles calif norristown pa dd st louis mo ma wilmington chattanooga tn hazleton pa |