April 27, 1917. THE COLLIERY GUARDIAN. 801 — COMPARE — Working Parts of JEFFREY COAL CUTTERS With other Well-known Machines. M; HUGH WOOD & CO. LTD., Newcastle-on-Tyne. LONDON : 65, Fenchurch Street, E.C. CARDIFF : 102, St. Mary Street. MANCHESTER : The Hive Works, Trafford Park. 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. i ; I. J|a __ One of Two 1,400 c.f. Air Compressors, in De Beers Mines S.A. ADVANTAGES DURABILITY HIGH EFFICIENCY. BEST WORKMANSHIP. MINIMUM MAINTENANCE BELL1SS & MORCOM LIMITED, Telegrams : BELLISS, BIRMINGHAM.” BIRMINGHAM. London Office: 8, VICTORIA STREET, S.W.