December 24, 1915. THE COLLIERY GUARDIAN. 1309 _________ Mining |BOOKS At Tremendous Reductions ! New Books at 25 per cent. Discount! Books on Mining, Technical and all other Sub- jects. Sent on Approval. State Wants. Send for Lists. Books Purchased. W. & G. FOYLE, 121’123, Charing Cross Road, London, W.C. _________ ___________________________ OXYGEN. The BRITISH OXYGEN Co. Ld. The oldest and most extensive Oxygen producing and distributing business in the World. Factories in all industrial Centres equipped with modern plants producing Oxygen of unrivalled quality for use with RESCUE APPARATUS. LONDON ADDRESSES OF THE COMPANY’S WORKS : Elverton St., Westminster, S.W. Tunnel Avenue, East Greenwich, Saltley Works. [S.E. Lower Walsall Street. East Moors. Great Marlborough Street. Bromborough Port. Celtic Works, Savile Street. BIRMINGHAM ... WOLVERHAMPTON CARDIFF ______ MANCHESTER___ BIRKENHEAD___ SHEFFIELD ___ NEWCASTLE-ON- TYNE ______ GLASGOW______ SYDNEY ______ Walker Gate. Rosehill Works, Polmadie. N.S.W. equisitesvfor the Colliery Engineer PACKING EJECTOR or WATER LEATHER BELTING, Also Cotton, Balata, Hair, &c. “JOINTITE” JOINTING. RUBBER INSERTION and other Joints cut to any shape, from stock. ENGINE’ PACKING.: rWOODITE'i The best material for Conical GAUGE GLASS RINGS in all sizes and sections For Valves, Joint Rings, Pump Cups, Ram Rings, Packing Rings, Price List and full particulars on application to— WOODITE CO.j Mitcham Common, Surrey. ■■■. SPECIALTIES.- Rocker Bar Furnaces ; ' ; < I; ■ Fqr maximum efficiency With natural draught. Twin-Door Furnace Fronts . For? large Boilers, side-firing,, smoke-burning.;.’ Sectional Back Bridges >,a New economic, composite type ; fusion-proof . Tub-Controllers For all sizes of tubs or tipping trucks. . Wire Rope Cappels , The new safety quick hosing system. ’ Visual Signal Indicators For all winding conditions; J. & J. NEIL & CO., Engineers, < • 93, Hope Street, GLASGOW. can supply your requirements. A COPY OF OUR 736 pp. CATALOGUE WILL BE GLADLY SENT UPON RECEIPT OF APPLICATION. Write, 'Phone, Wire, or call personally. W. H. Willcox & Co. Ltd., 32 to 38, Southwark St., London, S.E. Telegraph : “ Willcox, Southwark Street. London.1 Telephone : Hop 3740 (3 lines). Hop 2538 (1 line). Hop 1992 (I line) RAISER. INJECTOR. WILLCOX'S PATENT British Manufacture Best Quality at Lowest Prices o Every description either separate or in cases. SPECIAL 12 in, CARDBOARD PROTRACTOR, reading to i°, at 2s. Od,, postage 6