708 THE COLLIERY GUARDIAN. April 14, 1916. COKTEHTS. Editorial Articles :— page Industrial Research ....................... 709 Freights and Italian Trade................... 709 Articles:— . A New Type of Mine Breathing Apparatus....... 701 The Sinking and Equipment of a Circular Shaft ... 702 The Plexsim Electric Still................. '703 Influence of Incombustible Substances on Coal Dust Explosions .......................... 704 Economies in Coal Washing .................. 705 Trade and the War.......................... 707 Maximum Prices of Coke, Steel, and Bar Iron . 710 Some Recent Decisions under the Workmeir’s Com- pensation Act ......................... 714 Fuel Economy............:................... 718 United States Exports of Coal and Coke in 1915 ... 718 A Simple Shaft Gate.......................... 718 Book Notices............................... 719 Mining Industry and Military Service ........ 719 Coal and Coke Exported from Ports in England, Scotland and Wales ........................ 721 Coal and Coke Shipped for London and Other Ports in the United Kingdom ............ 721 Obituary..................................... 721 Labour and Wages............................. 722 Open Contracts ............................ 722 The Freight Market ......................... 722 Exports of Coal, Coke, and Manufactured Fuel from the United Kingdom ................... 723 Abstracts of Patent Specifications Recently Accepted............................... 724 New Patents Connected with the Coal and Iron Trades..................................... 726 Government Publications ..................... 726 Publications Received ...................... 726 Current Science and Technology............... 706 Indian and Colonial Notes ........;.......... 719 Parliamentary Intelligence ................ 718 Notes from the Coal Fields .................. 720 Coal, Iron and Engineering Companies ........ 723 The Coal and Iron Trades..................710—714 The Tin-plate Trade ......................... 714 The By-Products Trade ...................... 714 The London Coal Trade .................... 714 Reports of Meetings :— Mining Institute of Scotland..................... 707 North of England Institute of Mining and Mechan- ical Engineers ................................. 715 Manchester Geological and Mining Society........ 717 Miscellanea :— Mineral Production of Japan—Exports and Imports of Mining Machinery....................... 703 Shipments of Bunker Coal—American Coal Trade Conditions............................... 705 Imports of Pit Props.................... 706 Output of Coal in the United Kingdom—Swedish Iron Trade in 1915 ...... ,............. 707 Wastage of Coal in Transit................ 712 Trading with the Enemy—Business Side of Science 714 Partnerships Dissolved ..... ............. 717 Hull Coal Exports—Spanish Miners and Military Service—Coal in Spitzoergen.............. 718 Mongolian Coal .....................'...... 719 Hull Coal Imports ......................... 722 Grimsby Coal E sports.................... 723 Iron and Steel Institute—South Staffordshire and Warwickshire Institute of Mining Engineers. 726 ADVERTISEMENTS. Offices for ADVERTISEMENTS and PUBLICATION— 30 & 31, Furnival Street, Holborn, London, E.O. Telegraphic Address—“Colliery Guardian, Fleet, London.” Telephone—1354 Holborn. CONTRACT ADVERTISEMENTS : Prices for SPECIAL POSITIONS on application. Prices for ORDINARY POSITIONS Single Column (3 inches wide) : * For 52 insertions 2s. 6d. ") per insertion for each „ 26 „ 3s. Od. >• r _ x,- „ 13 „ 3s. 6d. ) inch ln dePtk Double Column (6 inches wide), double the above rates. Three Columns (9 inches wide), three times the above rates. MISCELLANEOUS ADVERTISEMENTS : Advertisements are inserted on the last white page or leader page at the following rates :— One insertion ... 10s. 6d. per inch per insertion. Three insertions 9s. 6d. ,, ,, Six insertions ... 9s. Od. ,, ,, A reduction of 25 per cent, is allowed on advertisements of second-hand machinery. Situations Vacant and Wanted : One Penny per word, minimum 2s. 6d. (which must be' prepaid). Can be received up to TEN o’clock on Friday morning. (A Classified List appears on page 728). Established 1866. PATENTS, DESIGNS, and TRADE MARKS. TTARRIS AND MILLS, Chartered Patent Agents, 34 and 35, HIGH HOLBORN, LONDON, W.C. ^Telegraphic Address—** Privilege, London.” Tel. No.—Holborn 2763. VENTILATING FANS AND ENGINES. See Advertisement appearing on front Cover of alternate weeks. Tt8E WADDLE PATENT FAN AND ENGINEERING CO. LTD., Uanmore Works Llanelly VIVIANS BORING COMPANY WORK GUARANTEED. BORING tor MINERALS, &o. 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. nr. Manchester. STEEL Rails Roof Rars Pit Props Arches For COLLIERIES ’ and WORKS. THQS W. WARD Ltd., Albion Works, SHEFFIELD. TRY US. -------- AGENT FO® PROPRIETOR, OF TH® Cardiff Brattle© Cloth Company^ •20, BUTE ST«s CARDIFF. Nobel's Explosives, Colliery Owners requiring temporary representation for period of the war; wellkn^wn London firm will undertake duties for nominal expenses onlj'.—Box 6372, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.O. A dvertiser, 43, second-class certificate, YTjl having had 7 years’ experience as fireman, desires position as FIREMAN, OVERMAN, or UNDER-MANAGER, day or nights.—Bom 6376, Colliery Guardian Office, 30 & 31, Furnival-st., Holborn, London, E.C. APPOINTMENT REQUIRED. s Enginewright or Foreman by one fnllv competent with all kinds of mining machinery; now at liberty -Box 6378, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. q^horoughly competent Manager wanted JL for a large by-product coke ovens plant; only energetic and capable men with practic 1 experience in manufacturing and dealing with coke, tar distillation, ammonia (sulphate and cmcentrated liquor), crude and rectified benzol, need apply —State aere, exp rience, qualification, salan required, and references, to Box 6380, Coliery Gxtrdian Office, 30 & 31, Furnival-street, Holborn, London, E.O. TWanted by a large West Yorkshire V V colliery, a practical man with a first-class certificate to assist General Manager, and to spend most of his time below ground.—Apply, Box 6382, Colli* » Gvavnta Office, 70 & 31, Furnival-street, Holborn, London, E.C., stating age, experience, and salan required. Qualified Veterinary Surgeon would be glad of situation (whole or part time) to supervise and assist generally in the care and manasrement of a stud of colliery horses ; excellent references.—Apply, Box 6383, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.O. T^nginewright wanted to take charge, 1 J under a manager, of all boilers, surface and underground machinery, and surface works at a large Yorkshire colliery : early morning attendance will be required; a liberal salary will he paid to a thoroughly trained, experi enced, and competent man.—Box 6384, Colliery Guardian Office, 30 & 31, Furnival-street. Holborn, London, E.O. A dvertiser, holding First-class Certi- JLjL ficate, 17 vears’ practical experience, desires re-engagement as MANAGER or UNDER-MANAGER, age U; good references, reasonable offer accepted for immediate position.—Box 6374, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. VUanted, Situation as Manager, Foreman ▼ V of wagon makers and wood converting mill; good practice of colliery work; good disciplinarian; over military age—Box 6338, Colliery Gua* dian Office, 30 & 31, Furnival-street, Holborn, London, E.C. The Colliery Ready Reckoner and Wages CALCULATOR. By JAMES IRELAND. " Will be the means of } preventing many disputes between pay clerks and colliers.”—Mining Journal. Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, I London, E.C. Cloth limp, price Is. 6d. ; post free, Is. Id. I Geo. N. Dixon & Co., 43, Castle Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant In Bankruptcy, re CHARLES WALKER, Pit Sinker, Coventry. The Trustee is authorised to offer for Sale by Private Treaty his interest in British Patents Nos. 892 of 1912 and 204 of 1913 for the sinking of colliery and other shafts. The inven- tion is particularly suit ible for sinking where water bearing strata or ru-ming sand are likely to be encountered, and shafts dealt with by Walker’s process h >ve b-ien successfully completed. For further particulars, apply to the TRUSTEE. C. F. B. Flint (of the firm of F int & Thompson), Chartered Accountants, 71, Temple Row, Birmingham. OLDHAM CORPORATION GAS WORKS. Tenders for a supply of Coal are invited for twelve months, commencing 1st July next or earlier.—Address tenders to Mr. Arthur Andrew, Gas and Water Offices, Oldham. J. EL HALL8WORTH, 6th April, 1916. Town Clerk. TO COLLIERIES AND COAL MERCHANTS. rphe Sewerage Committee of the Norwich 1 Corporation is prepared to receive 1 ENDERS for the supply of 500 tons of gin. to 1^in. best machine made and washed ANTHRACITE BEANS. Specification and form of tender mav be obtained of the undersigned. Sealed tenders endorsed “ Anthracite Bears ” addressed to the Chairman of the Sewerege Committee of the Norwich Corporation, must be delivered at my office n »t 1 iter than 11 a.m. on Tuesday, 2 d May, 1916. T e Corporation does not bind itself to accept the lo vest or any tender. Guildhall, Norwich, ARTHUR E. COLLINS M.Infit.C.E. 7th April, 1916. City Engineer. Cmall Coal Field to Let near Barnsley, Yv workable seams Melton Field, Two Feet, Winter, and Beamshaw; good railway facilities ; no water difficulties antic;pated.—Apply, Box 6368, Colliery Guardian Office, 30 & 31, Furnival street, Holborn, London. E.C. CANAL BOATS. anted to Purchase, new or good V V second-hand Cinal Boats, suitable for Birmingham traffic.—Reply, giving description, age, and price, Box *'F. 8,” 34, Union-st., Birmingham. For Sale, Coal Screening Plant.— Curved Tippler Shute, Double Screens for three sizes, Plate Coal Belt, 35 ft. by 4ft., Blind Nut Belt. 35 ft. by 3 ft. 6 in., Driving Shafts and Wheels. PERCY CLARK, King-street, Wigan. For quick delivery, several Pumps, capacities ranging from 500 gallons to 100 gallons per minute for heads ranging from 1,000 to 200 ft.; suitable for electric drive.—ANDREW BARCLAY, SONS & CO. LTD., “Caledonia” Works, Kilmarnock, Scotland. J. W. BAIRD AND COMPANY, t PITWOOD IMPORTERS, WEST HARTLEPOOL, YEARLY CONTRACTS ENTERED INTO WITH COLLIERIES. OSBECK & COMPANY LIMITED, PIT-TIMBER MERCHANTS, NEWCASTLE-ON-TYNE. SUPPLY ALL KINDS OF COLLIEKY TIMBER. Telegrams—“ Osbecks, Newcastle-on-Tyne.” *** Kor other Miscellaneous Advertisements see Last White Page. AND Journal of the Coal and Iron Trades. Joint Editors— J. V. ELSDEN, D.Sc. (Lond.), F.G.S. HUBERT GREENWELL, F.S.S., Assoc.M.I.M.E. (At present on Active Service'). LONDON, FRIDAY, APRIL II, 1916. The London coal trade continues strong. Prices are unchanged, and few collieries can accept orders. Spot supplies are practically unobtainable on the Tyne, and Wear, and freights, though small in number, are fairly adequate for the demand. Small lots are reported to be changing hands at very high prices. Warmer weather has toned down the demand for household coal in Lancashire, Yorkshire and Cheshire, but there are no open supplies, and some munition works are taking anything. In Cardiff a slight business is transacted at increased prices. Freights are a little easier. Scottish collieries are inclined to await higher prices. Shipments have improved. Exports of coal, coke, and manufactured fuel during March aggregated 3,281,793 tons, of the value of £3,565,210. This compares with 4,143,756 tons, valued at £3,179,635, and 6,170,720 tons, valued at £4,248,561, in the corresponding months of 1915 and 1914 respectively. During the first three months of the year the exports of coal, coke, and manufactured fuel totalled 9,975,276 tons, of the value of £10,155,609, as against 11,693,248 tons, valued at £3,446,742, and 18,234,299 tons, valued at £12,738,062, in the corresponding periods of 1915 and 1914.. Of the total exports of coal during March, the mean value of the large coal was 24s. l*9d. ; through-and-through (unscreened), 19s. l’3d. ; and small coal, 17s. 6-2d. The average value of all