986 THE COLLIERY GUARDIAN. May 26, 1916. CEMENTATION for WET VIRGIN GROUND ooa YEARS of STUDY and EXPERIENCE HAVE BROUGHT MY SYSTEM OF CEMENTATION TO PERFECTION. TO COLLIERY PROPRIETORS. Shafts sunk, tunnels driven, and other mining constructions carried out in difficult and very wet ground by the best method. Success guar- anteed. 18 shafts completed in England, and 7 in progress. Ferro-Concrete Lining a speciality. Feeders of water in shafts or levels effectually treated. ALBERT FRANCOIS, "doncIsVer" Telegrams—“Francois, Doncaster,” Telephone—408 Doncaster, Trade L The Largest Manufacturers of SURVEYING and DRAWING INSTRUMENTS in the world. Stanley’s Telescopic Abney Level and Clinometer. Theodolites, Levels, Mining Dials, Prismatic Compasses, Rods, Tapes, Chains, Drawing Instru- ments and Stationery. All of the highest quality. Please send for our “ K.12 ” Catalogue, and compare our prices with those of other first-class makers. W. F. STANLEY & CO. LTD., Head Offices and Showrooms:— 286, HIGH HOLBORN, LONDON, W.C. HOWARD STREET PRINCEPS PATENT “DEFLECTOR” OIL SEPARATOR. ... Capacity, 300,000 lbs. of steam per hour, 60" diameter main. ONE OF THE LARGEST EXTRACTORS MADE IN THIS COUNTRY. PRINCEPS & CO., Engineers, SHEFFIELD. ---------- SUTCLIFFE’S ------------------ COAL CUTTERS, DISC & CHAIN TYPES, light or heavy pattern, for thin or thick seams, with shallow or deep cuts. Compressed Air or Electrical Drive. Coal-Face Conveyors, unrivalled in capacity, constant in work, noiseless in the face and most easily moved forward. Roadway Conveyors, which are moved freely from the face to admit ripping in the gateway. Hauling Gear, to keep a constant supply of tubs between the engine plane and coal face with instantaneous extension of endless rope. Wire Belting, for conveyors of all kinds. Thomson’s Non>Overwind, simplest, safest, surest, and cheapest. Sutcliffe's Universal Sounding and Displaying Signalling Apparatus, fully complying with Regulation 95 of the Mines Act. NOTE. The above machinery is all patented cr protect, d, and m kers or users of Infring-ing- articles will be liable to be prosecuted. FULL PARTICULARS FROM RICHARD SUTCLIFFE, Universal Works, HORBURY, WAKEFIELD, England. Save Money - Save Goal - Save Steam By adopting FORREST’S PATENT AUTOMATIC Cylinder DRAIN COCKS on your Compound, Winding, Hauling, and all your Stationary Engines, Steam Winches, &c. (Thousands in use), now fixed on most new Engines turned out by leading Engineers, The Safest Automatic Drain Cock ever fixed on Com- pound Condensing Engines, most positive in action. Makers of High class Gunmetal Gland Taps. Wheel Valves, &c, Class B For Prices, Particulars and Testimonials, apply Sole Makers, APPLETON & HOWARD, Br’gXa."s.a"d ST. HELENS, LANCS. Contractors to the War Office. 4NNALS OF COALMINING & THE COAL TRADE. By Post, 25s. 9d. BY ROBERT L. CALLOWAY. Price w net. The Colliery Guardian Co. Ltd., 30 & 31, Fumival Street, Holborn, London, E.O. Jl. Standard M.P. Turbine. STEAM TURBINES. High Pressure Mixed Pressure Low Pressure FOR Ironworks AND Collieries. Reliable. Economical. Compact. Richardsons Westgarth & C° LTD MIDDLESBROUGH. HARTLEPOOL. SUNDERLAND.