Handbook of construction plant, its cost and efficiency (1918)
Dana, Richard Turner, 1876-1928 · New York, McGraw-Hill book company, inc., [etc., etc.] · leaf 27
> ^■^6 g^^IS.2 •3^ u 0 ^Wi3 |z« M ^ AIR COMPRESSORS 23 Gloucester, Mass., has large areas covered with glacial boul-ders, which add greatly to the cost of any sort of excavation andhere steam tripod drills, operated by portable boilers, were usedto blast these boulders until March, 1910, when a… … Fig. 13. Sullivan WK-3 Air Compressor Outfit and SullivanDB-15 Hammer Drills. at 165 revolutions with 80 to 100 lbs. air pressure. A hoistingattachment was mounted on the rear of the truck for pullingrock fragments from trenches, etc. Besides this, the machinewas provided with a gasoline tank,…
Contractors' operations · Building
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