696 THE COLLIERY GUARDIAN April 5, 1918. CONTENTS. Editorial Articles:— Page Local Taxation ............................... 697 Coal Control in India......................... 697 The New Coal Control Directions .............. 698 Articles :— Coal and Shipping1 “Carbocoal” : a New American Fuel 689 691 The Briquetting of Anthracite ................ 692 Spontaneous Heating of Slack Heaps ........... 693 Canadian Coal and Coke Output in 1917 ........ 694 Daily Cost Sheets for Mine Managers .......... 694 Separating Materials of Different Specific Gravities 694 South Wales Mining Timber Trade .............. 700 Coal Researches in France and Algeria ........ 701 Mine Drainage by Air Lift .................... 701 Naphthalene as a Pest Destroyer .............. 701 The Utilisation of Furnace Gases and Steam... 701 Electric Control of a Dragline Excavator ..... 702 The Variation of the Magnetic Compass from the True North ................................. 702 Book Notices ................................. 702 2,000 kw. Motor Converter .................... 703 Anticipating the Comb-Out..................... 703 Obituary ................................... 704 Labour and Wages.............................. 706 The Freight Market ........................... 706 Open Contracts ............................. 706 Publications Received ........................ 706 Catalogues and Price Lists Received........... 706 Abstracts of Patent Specifications Recently Accepted ................................... 708 New Patents Connected with the Coal and Iron Trades ..................................... 710 Reports of Meetings:— South Wales Institute of Engineers............ 691 The Coal and Iron Trades .....................698 —700 The London Coal Trade ..................... 698 The Tin-plate Trade........................ 700 The By-Products Trade ..................... 701 Current Science and Technology ................ 695 Indian and Colonial Notes ..................... 701 Notes from the Coal Fields..................... 703 Coal, Iron and Engineering Companies........... 708 Miscellanea :— Partnerships Dissolved..................... 691 A Plea for Committees...................... 694 Coal Control and the Gas Industry—English Miner s’ Wages .......................... 695 Iron Mining in Sweden...................... 698 Midland Iron Trade—Petrol from Cannel Coal ... 700 Coal Situation in Austria.................. 701 Shipments to Italy......................... 702 Mining Industry and Military Service....... 704 United States Steel Prices ................ 706 Utilising Fuel Waste ...................... 710 Offices for ADVERTISEMENTS amd 30 & 319 Furm vsl E.G. 4. 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RAILS. WAGONS. (For all purposes). (Coal & Ballast). Boiler Tanks. Points and Crossings. CRANES. (Loco & Derrick). Sleepers. Buffer Stops. Buyers of all kinds Steel and Iron Scrap. —“TREFOR”— BORING AHO SINKING CO., Contractors for Deep Borings and Pit Sinkings a// over the World, Bank Chambers, 329, High Holborn, LONDON, W.C. HHnHHBRHMKHMHKHRMRHMS&HSnBMMUBBHU KOPPERS' PATENT BYE-PRODUCT COKE OVENS AND NEW SYSTEM OF RECOVERING THE BYE-PRODUCTS GIVE RESULTS WHICH HAVE NEVER BEEN EQUALLED BY ANY OTHER SYSTEM. See large advertisement appearing in alternate issues of this Journal. All communications to be addressed to— THE KOPPERS’ COKE OVEN & BY PRODUCT CO., 301, Glossop Road, Sheffield. Teh No, 1935. Tel. Address—“ Kochs, Sheffield.” Geo. N. Dixon & Co., 43, Castle Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant. Clarke, Chapman & Co. Ld., GATE SET E J5JD. Wires— Telephones— “ Cyclops, Gateshead.” 1070, 1073 Central; 137 City. 2196 Central, Trunk Line. WATER TUBE ROILERS (‘ ‘ Woodeson ’ ’ Patents), Suitable for the highest pressures. All tubes straight, of equal length, and nearly vertical. Catalogue and Prices on application. JOHN STANIAR & CO., Manchester, Eng. Wire Weavers & Metal Workers. Established over 100 Years. --------- EVERY REQUISITE. ---------------- GAUGES in Silk and Wire. BRILSHES in Bristle, Weed, Fibre or Steel, for every known make of Brush Machine. PERFORA TEG PL A TES in Iron, Steel, Zinc, Brass, Copper. GUARBS for Engines, Stores, Machines, Strapping, Lifts, Ac. AWARD MEDALS—Japan-British 1910, Franco-British 1908. Telegraph—“ Gauze, Manchester.” Telephone—City 330# ARCHIBALD BAIRD & SON LTD. HAMILTON. Telegrams—Excello. Telephone—No 57. xvicpuuue—xxu o t • — Makers of — HP J*. GUTTA PERCHA PUMP vLJ BUCKETS, RINGS & WASHERS. AND ALL COLLIERY REQUIREMENTS. WANTED. SCRAP IRON & STEEL, of every description, COLLECTED WROT, & STEEL, separated or mixed. TURNINGS & BORINGS, heavy, medium & light, BOILERS, for pressure, tanking or scrap. Very highest prices free on rail any district. HAIaL. XL.E3ATIS & CO. - C A HO I iFT. ’Phone—3245 (Private Branch Exchange). Telegrams—“ Halcyon, Cardiff.” ARE YOU GETTING THE BEST OUT OF YOUR COAL? A “Lea** V. notch Recorder, by continuously measuring your Boiler Feed Water, would tell you and so help you to —: PREVENT WASTE. THE LEA RECORDER CO. LTD., Deansgate, MANCHESTER. THE ISCA FOUNDRY COMPANY LTD, RAILWAY PLANT Sf GENERAL ENGINEERS, Switches,Crossings,Turntables,Water Cranes,Girders, Bridges, Roofs, Pipes, Pumps, Wagons, Tanks, Engines, Boilers, Cranes, Works : NEWPORT, MON. London Office—53, Victoria Street, S.W. 1. Stop Taking Risks! Highest Efficiency, Longest Service obtained by using only “CHEKKO” BRAKE & CLUTCH LINERS. CRESSWELLS’ LD., Wellington Works, Bradford. AERIAL ROPEWAYS ANY SYSTEM. The British Ropeway Engineering Co. Ltd., 7, MINCING LANE, LONDON, E.C. 3. Tele—CENTRAL 11250.