332 THE COLLIERY GUARDIAN February 15, 1918. CONTENTS. Editorial Articles :— Page Electrical Supply and Coal Conservation...... 333 British. Forestry and Pit Timber ............ 333 Articles :— Starters for Squirrel-cage Induction Motors and their Application ......................... 325 The Occurrence of Coking Coals in Scotland .. 326 The Strength of Pit Props ................... 327 Electric Battery Locomotive for Staffordshire Copper Works............................... 328 Official Visits to Coal Fields .............. 328 Coal Freights to French Ports ............... 329 Storing Small Coal and Preventing Spontaneous Combustion................................. 329 Stripping and lie-lining a Shaft at Cowdenbeath, Fife ...................................... 331 The American Coal Trade ..................... 331 South Wales Mining Timber Trade ............. 337 Fuel Economy in Engineering ................. 337 Coal Economy from a National Standpoint...... 338 Labour and Wages............................. 340 The Freight Market........................... 342 Open Contracts .............................. 342 Obituary .................................. 342 Abstracts of Patent Specifications Recently Accepted .................................. 344 New Patents Connected with the Coal and Iron Trades .................................... 344 Government Publications...................... 346 Publications Received ....................... 346 Letters to the Editors :— The Yorkshire Colliery Deputies ............. 331 Reports of Meetings:— Mining Institute of Scotland ................ 328 North of England Institute of Mining and Mechanical Engineers ...................... 330 Manchester Geological and Mining Society..... 337 The Coal and Iron Trades .....................334 —338 The By-Products Trade ....................... 336 The Tin-plate Trade.......................... 337 The London Coal Trades....................... 338 Notes from the Coal Fields....................... 339 Coal, Iron and Engineering Companies............. 344 Miscellanea :— More Coke Available—Coal Carbonisation—Part- nerships Dissolved.......................... 327 Coal Conciliation Board — Gas Making and Residuals—High-Speed Tool Steel ........... 328 Maximum Price of Bar Iron—Coal Output in 1917—Miners and Food Control............... 329 New Japanese Iron Works ..................... 331 National Expenditure and Coal................ 334 Chemistry Research Scholarship—French Coal Output in 1917 ............................ 337 Mining Partnership Dissolved ................ 342 Nova Scotia Coal Output...................... 346 Established 1866. PATENTS, DESIGNS, and TRADE MARKS. T ARRIS AND MILLS, Chartered Patent Agents, 34 and 35, HIGH HOLBORN, LONDON, W.C. 1. Telegraphic Address—“ Privilege, London.” Tel. No.—Holborn 2763. PATENTS. Advice Free. h«°"6I69. J. New Inventions, Designs, Trade Marks, carefully and promptly protected at low INCLUSIVE FEES. THE CONSULTING PATENT AGENCY (1880), 253, Gray’s Inn Road, London, W.C. 1. CONTRACTS. The Guardians of the Poor of the Parish of St. Mary, Islington, invite TENDERS for the supply of HOUSE COAL to the several Institutions and Offices of the Guardians in the Parish for the period from the 1st March, 1918, to the 30th June, 1918, inclusive. Printed Forms of tender, containing full particulars and which alone will be received, must be obtained from the Clerk personally, or a stamped addressed brief-size envelope may be sent. Sealed Tenders must be delivered at the undermentioned Offices on or before Tuesday, the 26th day of February, 1918, and they will be opened at a meeting of the Guardians to be held on Thursday, the 28th day of February, 1918, at the undermentioned Offices. The Guardians do not bind themselves to accept the lowest or any Tender. Guardians Offices, (By Order) St. John’s-road, Upper Holloway, N. 19. EDWIN DAVEY, 14th February, 1918. Clerk. THE URBAN DISTRICT COUNCIL OF BARNES. TENDERS FOR COAL. The above Council are prepared to receive TENDERS for the SUPPLY of 7,000 tons SMALL NUTS, BEANS or PEAS, suitable for CHAIN GRATE STOKERS working under natural draught, for use at their Electricity Works, High-street, Mortlake, for 12 months, commencing from the 1st April, 1918. Forms of Tender, with particulars, may be obtained at my Office as under. Tenders must be sent so as to be received by me before 12 noon on MONDAY, the 4th March, 1918, marked “Tender for Coal, Electricity Works.” The Council reserve to themselves the right to decline all or any portion of the Tenders received. The Council House, (By Order) Mortlake, S.W. 14. WM. THOS. GOODALE, February 1918. Clerk to the Council. LANCASHIRE AND CHESHIRE COLLIERY UNDER-MANAGERS’ ASSOCIATION. 6, Colin Street, Wigan Lane, Wigan (General Secretary: JOSEPH BUTLER). MEMBERS OF THE NATIONAL FEDERATION OF COLLIERY UNDER-MANAGERS OF GREAT BRITAIN. The Council desire to make an earnest Appeal to all Under-Managers who are not yet members of any association to correspond with SECRETARY at the above Address, when Particulars of Membership will be forwarded, and Branches formed at Convenient Centres. Re recent advertisement for Colliery MANAGER and AGENT, Box 6943. This position has now been filled, and all applicants are hereby thanked for their applications. RANTED TO PURCHASE, Iron Scrap and Old Machinery. State District and whether can be loaded Free on Truck. ALSO SEND QUOTATIONS FOR:— IRON ORE, SLAG, OLD SCRAP LEAD, ZINC, and any other Metals on Rails. Box 6852, Colliery Guardian Office, 30 & 31, Furnival-st., Holborn, London, E.C. 4, VENTILATING FANS AND ENGINES. See Advertisement appearing on front Cover of alternate weeks. THE WADDLE PATENT FAN AND ENGINEERING CO. LTD., Llanmore\Works, Llanelly. VIVIANS BORING COMPANY h^Ow 85 Mites of Baring Complete^ WORK GUARANTEED ABF ../H-YENJ5, BORING for MINERALS, &c. Solid Specimens of the Strata obtained. Established 1888. Work guaranteed. J. S. DAVIDSON & SON, St. Bees, CUMBERLAND. “CROWN' BOILER COVERINGS of Outstanding Superiority. 96 SAYING Intensest Heat cannot Impair. SUTCLIFFE BROS. TST1 URO JOHN BAKER & SON. lA fl K I I* ff1 IRON AND STEEL WORKER® niBK V IB KfflW Thompson St., BILSTON TUB CORNER PLATES BUCKETS and BASKETS ARCHIBALD BAIRD & SON LTD. HAMILTON. Telegrams—Excello. Telephone—No. 57. xciepuuue—no. □/. — Makers of — * GUTTA PERCHA PUMP BUCKETS, RINGS & WASHERS. AND ALL COLLIERY REQUIREMENTS. See Illustrated Advt. PEEBLES Electrical Machinery in next week’s issue. BRUCE PEEBLES & Co. Ltd. Engineers. EDINBURGH. RAILS. RAILS. ALL SECTIONS AND ACCESSORIES. Also quantity F.B. suitable for bearers. Sleepers. Timbers. Switches and Crossings. Buffer Stops. Locomotives. Cranes. Wagons. ARMYTAGE & JONES Ltd., Sheaf Street, Sheffield. ARE YOU GETTING THE BEST OUT OF YOUR OOAL? 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. W. G. JENKINSON (ESTD. 1882), Chemical Plumber & Lead-Burner, Maker of every description of Lead=worK for Sulphate of Ammonia and By=Product Plant, Saturators, Coils and Ejectors. 43, EYRE STREET, SHEFFIELD. Tel2e#r~ WANTED. ft ft fl A ft IRON & STEEL, of every description. ft 11 ft A IT COLLECTED WROT. & STEEL, separated or mixed, WUimi TURNINGS & BORINGS, heavy, medium & light. ■■■■HU BOILERS, for pressure, tanking or scrap. Very highest prices free on rail any district. HALL, 3L.EV4TIS & CO. - CARDIFF. ’Phone—3245 (Private Branch Exchange). Telegrams—“ Halcyon, Cardiff.” WRAGGsBIGGINL"] [ Constructional Engineers, / : 50, Effingham Road, Sheffield, :■ ! MANUFACTURERS OF ■! English Steel Joists, Rivetted < Girders, Flitch Plates, Angles, [ Tees, Channels, Constructional JI Steelwork, &c., ■! I SOLICIT YOUR ENQUIRIES. I; I We hold a LARGE STOCK of all Sections for prompt delivery. i[ 1 Telegrams— Telephone— ] i 1 “ Girders, Sheffield.” 3873 Central. JI Geo. N. Dixon <£ Co., 43, Castle Street, Liverpool. Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant. R. GRAESSER Ltd., CS?L RUABON. BLACK VARNISH ( W