604 THE COLLIERY GUARDIAN September 20, 1918. CONTENTS. Editorial Articles:— Page Alfred Hewlett, J.P........................ 605 Future of British Coal Mining ............. 605 Articles :— Determining the Magnetic Meridian as a Basis for Mining Surveys ........................ 597 The Valuation of Ore Reserves ............ 598 Shortage of Coal.......................... 600 Mine Rescue Apparatus Research Committee: First Report ............................ 600 Portable Automatic Trimming Conveyor....... 601 South Wales Mining Timber Trade .......... 609 Mining Employment Statistics .............. 609 Whitley Committee’s Final Report ...........609 The Scottish Coal Order ................... 610 Obituary ................................ 610 Mean Magnetic Declination................. 612 Labour and Wages .......................... 612 Open Contracts .........................*.. 614 Publications Received ..................... 614 Coal Exports in August .................... 614 The Freight Market ........................ 614 The Coal Industry in Holland............... 614 Abstracts of Patent Specifications Recently Acptd. 616 New Patents Connected with the Coal and Iron Trades .................................. 616 Reports of Meetings:— Institution of Mining Engineers ........... 602 The Coal and Iron Trades ...................606—608 The By-Products Trade .................... 607 The London Coal Trade ..................... 608 The Tin-plate Trade........................ 608 Current Science and Technology ................ 610 Notes from the Coal Fields..................... 611 Coal, Iron and Engineering Companies........... 614 Miscellanea :— Coal and Iron in Ireland—Iron and Steel Institute 601 Coal Control in Canada—Miners from the Army... 602 Expediting the Release of Miner Soldiers .. 607 New Method of Testing Recruits ............ 608 Coalheavers’Claim........................ 609 Coal Grouping in Natal- Official Economy— Export Scheme—American Miners’ Increased Output—Lantern Slides for Lectures ......610 Imports of Pit Props — Imports and Exports of Mining Machinery....................... 612 Controller to Address Miners—Fuel Wood..... 614 Coal from Peat ......................... 616 SUBSCRIPTIONS. 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. Offices for Advertisements and Publication :—30 and 31, Furnival-street, Holborn, London, E.C. 4. Telegrams—“ Colliery Guardian, Fleet, London.” Telephone—1354 Holborn. A MEETING will be held on MONDAY, SEPTEMBER\23rd, 1918, at 3 o’clock p.m., in the GREAT HALL of the CANNON STREET HOTEL, LONDON, E.C. 4, To consider a proposal to form a Federation of the distributing COAL MERCHANTS OF GREAT BRITAIN. It is hoped that all Coal Merchants’ Associations will be repre- sented, and that all Coal Merchants interested will attend. GEORGE GENTRY, Hon. Secretary, Society of Coal Merchants, London. JOHN HALL, Secretary, Bletchley and District Coal Merchants’ Association. All correspondence to Mr. GEORGE GENTRY, 8, Coal Exchange, London, E.C. 3. Established 1866. PATENTS, DESIGNS, and TRADE MARKS. TT ARRIS AND MILLS, AA Chartered Patent Agents, 34 and 35, HIGH HOLBORN, LONDON, W.C. 1. Telegraphic Address—“ Privilege, London.” Tel. No.—Holborn 2763. JOHN STANIAR & CO., Manchester, Eng. Wire Weavers & Metal Workers. Established ovxb 100 Txabs. ---------- 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, Ac. AWARD MEDALS—Japan-British 1910, Franco-British 1908. Telegraph—" Gauze, Manchester." Telephone—City 3306 The Colliery Ready Reckoner and Wages CALCULATOR. By JAMES IRELAND. “Will he the means of preventing many disputes between pay clerks and colliers.”—Mining Journal. Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, JE.C. 4. Cloth limp, Is. 6d.; post free, Is. 8