696 THE COLLIERY GUARDIAN. October 13, 1916. STEAM, MOTOR, BELT, OR ROPE=DRIVEN AIR & GAS COMPRESSORS From 50 to 15,000 cubic feet FOR COLLIERIES, MINES, Etc. ADVANTAGES SIMPLICITY. RELIABILITY. SELF=LUBRICATION. SMALL FLOOR SPACE. •A * ■' .‘■n w. < - B. ... U .US' .: ... i <}/ ADVANTAGES DURABILITY. HIGH EFFICIENCY. BEST WORKMANSHIP. MINIMUM MAINTENANCE One of Two 1,400 c.f. Air Compressors, in De Beers Mines S.A. BELLISS & MORCOM LIMITED, Telegrams: OTO INC W A 1VI London Office : “ BELLISS, BIRMINGHAM.” AZ-VlVE. 8, VICTORIA STREET, S.W. STEAD' MANOR WORKS SHEFFIELD Teleymms STEADFAST SHEFFIELD ^o*