January 4, 1918. THE COLLIERY GUARDIAN. 49 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. 466. One of Two 1,400 c.f. Air Compressors, in De Beers Mines S.A. ADVANTAGES DURABILITY HIGH EFFICIENCY. BEST WORKMANSHIP. MINIMUM MAINTENANCE BELLISS & MORCOM LIMITED, Telegrams: 1-4 A 1VI London Office : “BELLISS, BIRMINGHAM.” DlIWll 1 ” 8, VICTORIA STREET, S.W. 1. GEORGE ANGUS & CO. LTD., NEWCASTLE-ON-TYNE. CONVEYOR BELTS I SEND FOR PRIDES. I Hlllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll^i of ALL DESCRIPTIONS. And at London, Liverpool, Birmingham, Manchester, Leeds, Glasgow, Cardiff, And JOHANNESBURG. QUALITY in SWITCH GEAR. LIQUID SWITCH GEAR of HIGH- CLASS MAKE and GOOD DESIGN. J. H. HOLMES & CO., Newcastle-on-Tyne. JWRITE for LIST No. 60 with PRICES and OUTPUTS. PUMPS°;-3 Telephone: 74. Telegrams : “ Pumps, StoKe=on=Trent.' T. Shore & Sons Ld. Engineers, Etruria, STOKE-ON-TRENT I