Hydraulic Drilling Machinery

1887 Scientific American  
SCIENTIFIC AMERICAN SUPPLEMENT, No. 617. 9849 g = 32. reason of not having the plates, etc., to mark off, take ct = 47,000. to the shop, and put back in place again. The ex- perience gained by the use oi these drills on board l = length in feet pipe. large armorclads built on t,he cellular system goes to 8 = coef. friction, 0 '006. prove that 25 per cent. more holes can be drilled by
doi:10.1038/scientificamerican10291887-9849asupp fatcat:ebjkg6qnhrbatijjpyya5z6i7u