900 THE COLLIERY GUARDIAN. May 3, 1918. CONTENTS. Editorial Articles:— Page Post-War Trade Policy..................... 901 | National Electricity Supply : a Criticism . 901 Articles :— Benzol Rectification ..................... 893 Approved Safety Lamps ..................... 894 The American Coal Trade ................... 896 Rock Salt in Coke-Oven Saturators ......... 897 Post-War Trade Policy...................... 898 Mining Industry and Military Service....... 899 Book Notices ............................. 899 South Wales Mining Timber Trade ........... 905 The Importance of Coke Hardness............ 905 Regulations for Ganister Working .......... 906 Labour and Wages........................... 906 Mean Magnetic Declination................ 907 The Freight Market ........................ 907 Open Contracts ............................ 908 Abstracts of Patent Specifications Recently Accepted ............................... 908 New Patents Connected with the Coal and Iron Trades ................................. 910 Government Publications..............r..... 910 Publications Received ..................... 910 Reports of Meetings:— Coke Oven Managers’ Association: Midland Section................................... 896 The Coal and Iron Trades ...................902 —905 The By-Products Trade ..................... 905 The London Coal Trade ..................... 905 The Tin-plate Trade........................ 905 Parliamentary Intelligence..................... 902 Notes from the Coal Fields.........,........... 906 Coal, Iron and Engineering Companies........... 908 Miscellanea :— Iron and Steel Trades Advisory Committee— West of Scotland Iron and Steel Institute— More Coal Restrictions................... 897 Partnerships Dissolved—German Coal Supply to Switzerland.......................:....... 904 Allowances for Depreciation—Middlesbrough Iron and Steel Shipments ................ 906 Sulphate of Ammonia Association ........... 907 Stone Dusting—Wigan Mining College Summer Courses.................................. 908 Gas for Motors—Fuel Production in Italy ... 910 The Oldest Diamond Drill Company. Established 1872. PORING fob MINERALS. SPEED AND CERTAINTY. CYLINDRICAL “CORES.” THE AQUEOUS WORKS and DIAMOND ROCK-BORING Co. LTD. Guildford St., York Road, Lambeth, London, S.E. Besides numerous other Important Contracts, completed (in 1897) the Deepest Boring in the United Kingdom to 3,500 ft. Great Experience in Boling for WATER. The U.M.S. LESSONS BY POST. The best Mining Education. Unapproachable Successes. 52 H.M. Inspectors are U.M.S. Men. — Syllabus free. — THE UNIVERSAL MINING SCHOOL ffi) 50, Connaught Road, Cardiff. Briquette Machinery Ltd., Charmouth Street, LEEDS. Machinery for Briquetting Peat, Lignite, Coke, Coal, Iron, Copper, Nickel, Cement; Also Sawdust, Waste Cereals, Offals, Sewage. PATENT COAL DRIER. Electrical Machinery See Illustrated Advt. PEEBLES in April 19th issue. BRUCE PEEBLES & Co. Ltd. Engineers. EDINBURGH. Geo. N. Dixon & Co., 43, Castle Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant. 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 jou to —: PREVENT WASTE. THE LEA RECORDER CO. LTD., Deansgate, MANCHESTER. AERIAL ROPEWAYS ANY SYSTEM. The British Ropeway Engineering Co. Ltd., 7, MINCING LANE, LONDON, E.C. 3. Tele—CENTRAL 11250. LANCASHIRE AND CHESHIRE COLLIERY UNDER-MANAGERS’ ASSOCIATION. ADVERTISEMENTS. Offices for ADVERTISEMENTS and PUBLICATION— 30 A 311 Furnival Street, Holborn, London, E.C. 4. Telegraphic Address—“Colliery Guardian, Fleet, London.” Telephone—1354 Holborn. CONTRACT ADVERTISEMENTS : Prices for SPECIAL POSITIONS on application. Prices for ORDINARY POSITIONS:— YEADONS’ LATEST PATENTED BRIQUETTE MACHINERY, For Coal, Coke, Iron and other Ores. YEADON, SON & CO., Engineers, LEEDS, Have a World-wide Reputation, and 40 Years’ Experience. They have supplied MORE BRIQUETTE PLANTS than any other firm in this country. 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. anted, by large firm of Constructional Engineers, DRAUGHTSMAN, fully experienced in the design of modem coal washing plant, to take entire charge of department.—Box 7035, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. anted, a thoroughly experienced COLLIERY ENGINE WRIGHT.—Apply, stating age, qualifica- tions and references, to MANAGER, Tilmanstone Colliery, Eythorne, nr. Dover. Brattice Cloth. — Gentleman Wanted with influence amongst colliery managers and proprietors, to sell BRATTICE CLOTH on good commission only.—Address, FAIRCLOUGR & SONS, Bank-lane, Clayton, near Manchester. Single Column (3 inches wide) : For 52 insertions 3s. 9d. per insertion for each ” 13 ” 5si 3di 5 inch in depth. ARMYTAGE & JONES Ltd., SHEAF STREET, SHEFFIELD. Double Column (6 inches wide), double the above rates. Three Columns (9 inches wide), three times the above rates. RAILS. WAGONS. (For all purposes). (Coal & Ballast). Boiler Tanks. Points and Crossings. CRANES. (Loco & Derrick). Sleepers. Buffer Stops. anted, Assistant Colliery Electrician, capable of taking charge of new 500-kw. Turbo Alternator Plant in the absence of Chief Electrician, and to assist generally.—State age, if exempt from military service, qualifications, salary required and when at liberty, to Box 7052, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. SUBSCRIPTIONS. Buyers of all kinds Steel and Iron Scrap. /Colliery Manager.—Wanted, competent practical MAN for Colliery in Lancashire.—Apply, giving full par- ticulars of experience, wages required and copies (only) of recent testi- monials, to Box 7053, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. The Colliery Guardian, published at 2.30 p.m. on Friday, can be supplied direct from the Publishing Offices, post free for twelve months, at the following rates :— United Kingdom ......... 28/6 (26/- in advance). Canada ................. 30/6 (27/6 do. ). Foreign and Colonial ... 33/- (30/- do. ). When foreign subscriptions are sent by Money Orders, payable through the Post Office, advice should be sent to the Publishers. 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. Tela^r- Wanted Enquiries from all the Collieries in the United Kingdom as to our Agency for REPORT BOOKS and FORMS, as prescribed by the Coal Mines Act, 1911.—Full particulars on application to the COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival-street, Holborn, London, E.C. 4. Offices for Advertisements and Publication :—30 and 31, Furnival-street, Holborn, London, E.C. 4. Telegrams—“ Colliery Guardian, Fleet, London.” Telephone—1354 Holborn. The Sheffield Mercantile Steel Co. Ltd. POLDI STEEL WORKS, Napier St., SHEFFIELD. Telephone Nos —1114 & 1115 Central Specialities : Telegrams -* Shemerco, Sheffield.” Alloy and Special Steels for all purposes. Mining Engineer and First-class Colliery MANAGER (M.I.M.E.), E.E. College diploma, DESIRES POST; 25 years’.practical and wide management on first-class collieries; cutting; extensive haulage and Colonial experience. Al references, &c. Home or abroad.—Box 7054, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Electrician Wanted for two Collieries near Manchester. High-pressure a.c. and d.c. Must be competent for running repairs, and telephones and signals. State wage required, and experience.—Apply, Box 7055, Colliery Guardian Office, 30 & 31, Furnival- street, Holborn, London, E.C. 4. Established 1866. PATENTS, DESIGNS, and TRADE MARKS. TT ARRIS AND MILLS, Chartered Patent Agents, 34 and 35, HIGH HOLBORN, LONDON, W.C. 1. Telegraphic Address—” Privilege, London.” Tel. No.—Holborn 2763. R. GRAESSER Ltd,, cgstL RUABON. BLACK VARNISH ( "yR^SERVATIVL0'’) CONTRACTORS TO BRITISH AND OTHER GOVERNMENTS. Telegrams: Established 1867. Telephone: ** Graesser, Buabon.” Code ABC 5th Edition. 3 Ru \bon. Small Going Colliery for Sale in SOMERSET, near Bristol, on G.W. Raily., working 4 Seams of Gas and House Coals, with full modern Equipment for 1,500 tons per week, and capable of development. A large area of Coal may be Leased. HEDLEY & HARPERS, Mining Engineers, All Saints-chambers, Derby JOHN STANIAR & CO., Manchester, Eng. Wire Weavers & Metal Workers. Establisxed over 100 Years. --------- EVERY REQUISITE. ------------------- GAUZES in Silk and Wire. BRUSHES in Bristle, Weed, Fibre or Steel, for every known make of Brush Machine. PERFORA TED PL A TES in Iron, Steel, Zinc, Brass, Copper. GUARDS for Engines, Stores, Machines, Strapping, Lifts, &c. AWARD MEDALS—Japan-British 1910, Franco-British 1908. Telegraph—** Gauxe, Manchester.” Telephone—City 3309 ASSOCIATION OF PRIVATE OWNERS OF RAILWAY ROLLING STOCK. Formed in 1891 for the Protection of the Rights and Interests of Private Owners. Applications for particulars and terms of membership may be sent to the SECRETARY, Clarence Chambers, Gloucester. —“TREFOR”— BORING AND SINKING CO., Contractors for Deep Borings and Pit Sinkings a// over tho World. ----;— Bank Chambers, 329, High Holborn, LONDON, W.C. T?or Sale, as a going concern, a Valuable COLLIERY PROPERTY in North Staffordshire; well equipped with latest machinery for hauling and screening; own sidings on North Staffordshire Railway. The property consists of several hundred acres Coal- bearing land, one seam in advanced state of development; two other good seams of valuable house Coal already proved and right for getting. Also other known seams not yet proved. Apply to Messrs. MELLOR, SNAPE & CO., Chartered Accountants, Queen’s-chambers, 5, John Dalton-street, Manchester. /Colliery at Moor Row, Cumberland, to be LEASED from 30th June next; raising about 100 tons a day, but capable of much increased output.—Apply, KELLETT, ELLIS, WALKER and ROGERS, Mining Engineers, 33a, King-street, Wigan. TENDERS FOR COAL. Tenders are invited for the supply of 650 tons of ROUGH SMALL STEAM COAL, 60 tons of HOUSE COAL, 15 tons LARGE STEAM COAL, etc. Forms of Tender and further particulars may be obtained from the BOROUGH ENGINEER, Municipal Offices, Cheltenham, to whom sealed and endorsed tenders are to be delivered on or before the 22nd May, 1918. OLDHAM CORPORATION ELECTRICITY WORKS. PLANT FOR SALE. The Oldham Corporation Electricity Committee OFFER for SALE the following PLANT 2 WILLANS-SIEMENS 740-kw. SETS, shunt wound, 450-480 volts. The plant is in good working condition, and can be seen by appointment. If necessary, arrangements could be made for the Corporation’s staff to carry out the dismantling. Full particulars can be obtained from Mr. F. L. Ogrden, Joint Engineer and Manager, Electricity Works, Greenhill, Oldham. The highest or any Tender not necessarily accepted. Town Hall, Oldham. J. H. HALLS WORTH, . April 29th, 1918. Town Clerk.