72 THE COLLIERY GUARDIAN. July 9, 1915. CONTENTS. Editorial Article :— page The Half-year's Coal Trade .................. 73 Articles :— The Microscopical Examination of Coal ........ 65 Housing and Town Planning in the Doncaster Coalfields ................................. 66 A New Winding Signalling System .............. 67 Retail Coal Prices ........................... 68 London County Council Coal Contracts.......... 69 The German and Austrian Coal and Iron Trades ... 70 Trade and the War............................. 71 Obituary...................................... 79 Mining and Other Notes........................ 79 Labour and Wages.............................. 79 Book Notices.................................. 81 Open Contracts................................ 84 Coal and Coke Exported from Ports in England, Scotland and Wales ......................... 84 Coal and Coke Shipped for London and Other Ports in the United Kingdom ................ 84 The Freight Market ........................... 85 Exports of Coal, Coke, and Manufactured Fuel from the United Kingdom ..................... 86 Abstracts of Patent Specifications Recently Accepted.................................... 87 New Patents Connected with the Coal and Iron Trades ..................................... 88 Government Publications ...................... 88 Publications Received ....................... 88 Current Science and Technology . ............... 70 Notes from the Coalfields ....................... 81 Coal, Iron and Engineering Companies ............ 85 The Coal and Iron Trades.................... 71, 74—78 The Tin-plate Trade .......................... 71 The By-Products Trade ........................ 78 The London Coal Trade ........................ 78 Miscellanea :— Association of Private Owners of Railway Rolling Stock ...................................... 66 United States Imports and Exports of Fuel .... 67 Hull Coal Exports—Coal Supply Conference..... 69 Grimsby Coal Exports ........................ 74 Partnerships Dissolved—Immingham Coal Exports 78 Mines Inspection : Scotland Division.......... 88 For 52 insertions 2s. 6d. *) „ 26 „ 3s. Od. £ „ 13 „ 3s. 6d. ) ADVERTISEMENTS. Offices for ADVERTISEMENTS and PUBLICATION— 30 & 31, Furnival Street, Hol born, London, E.C. 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) : per insertion for each inch in depth. 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. 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British, U.S., and Canadian Patent Agents.—THE CONSULTING PATENT AGENCY, 253. Gray’s Inn- road, London, W.C. Write, call, or phone. Ph.: Holborn 6109. 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 WORK GUARANTEED. BORING for MINERALS, &o Solid Specimens of the Strata obtained. established 1888. Work guaranteed. J. S. DAVIDSON & SON, St. Bees, CUMBERLAND. “CROWN” BOILER COVERINGS encased in STEEL SHEETING. Simply unimpairable by heat. 96°10 SAYING in Condensation. Greatest Economy & Service. Nearly 5,000 Users. SUTCLIFFE BROS. nr. Manchester. STEEL Rails Roof Bars Pit Props Arches For COLLIERIES V and WORKS. THQS W. WARD Ltd., Albion Works, SHEFFIELD. TRY US. ------- BAdZe-sapttent Friction Clutches &, Hauling Ins1>Ei>lla>tioTi.s A SPECIALITY. SEE ADVERTISEMENT LAST ISSUE. PAGE 47. Sole Makers— DAVID BRIDGE & CO. LTD., Haulage Works, CASTLETON, Manchester. THE LAW RELATING TO MINES Under the COAL MINES ACT, 1911. An OFFICIAL GUIDE to the Mines Act ISSUED BY THE HOME OFFICE. Price 2s. By Post 2s. 4d. To be obtained of THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C. THIRD EDITION. Cro*n 8«o.. eloth, lettered. 114 pp. Priee 2». /’Colliery Ventilation. By J. Stanley James, M.E. The chief object of this small treatise is to afford some assist trace to candidates for Colliery Managers’ Certificates of Competency, both first and second class. The principles involved have been first worked out In a general form, and afterwards numerical examples have been taken, the calculations of which have been fully worked out so as to make them intel- ligible to those who may not possess much knowledge of algebra. THE COLLIERY GUARDIAN CO. LTD., 30 & 31. Furnival-street, Holborn, London, E.C, Price 2s. 209 pages. Fifth Edition. /lolliery Manager’s Calculator, containing Practical Rules and Tables for the Solution of the various Questions connected with Mining. Written for the use of Colliery Managers, Mining Students, Mine and Mineral Agents, &c. By W. FAIRLEY, F.G.S., &c„ &c. The present edition has been thoroughly revised and much extended, several entirely new chapters being added. Contents :—Mensuration—Surveying—On Work— Calculations on Friction —Specific Gravity—Calculations relating to Steam Engines, &c.—Properties of Atmospheric Air—Timber Measure—The Produce of Coal Seams, Coal Heaps, &c—Rating Mines and Quarries—Land and Mineral Estates—Acci- dents in Collieries—Ventilation Notes—Useful Rules and Memoranda — Tables of Weights and Measures. THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C. COOKE & BYRNE, 60, HARCOURT ST., DUBLIN, are prepared to form Private or Public Limited Com- panies with a view to providing additional capital. COLLIERIES BOUGHT AND SOLD. All correspondence treated confidentially. Address, COOKE &, BYRNE, 60, Harcourt Street, Dublin, and at London, Liverpool, Manchester, Glasgow, Paris, and I other Branches. Geo. N. Dixon & Co., 43, Castle Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant. J. W. BAIRD AND COMPANY, PITWOOD IMPORTERS, WEST HARTLEPOOL, YEARLY CONTRACTS ENTERED INTO WITH COLLIERIES. OSBECK & COMPANY LIMITED, PIT-TIMBER MERCHANTS, NEWCASTLE-ON-TYNE. SUPPLY ALL KINDS OF COLLIERY TIMBER. Telegrams—“ Osbecks, Newcastle-on-Tyne.” *** For other Miscellaneous Advertisements see Last White Page. (Mfcnj (buartlum AND Journal of the Coal and Iron Trades. Joint Editors— J. V. ELSDEN, D.Sc. (Lond.), F.G.S. HUBEBT GREENWELL, F.S.S., Assoc.M.I.M.E. LONDON, FRIDAY, JULY 9, 1915. The London coal trade continues brisk notwith- standing the hot weather. House coals are, however, accumulating at the various wharves and depots. The delivery trade is moving freely on account of the large numbers of public orders. Manufacturing qualities are in good demand. Small nuts and slacks are falling off and prices are weakening. Derby brights, kitchen cobbles, and bakers’ nuts are selling freely. The seaborne market is well supplied. Contract business is being perceptibly hampered by the delay of the Government in making known their intentions as to the regulation of coal prices. Nearly all the winter’s output of house coal has now been taken up at an advance that may not improbably coincide with the official view. Gas companies, however, are meeting the situation with difficulty, and the price of gas is being raised in many instances. Industrial consumers are still adopting a hand-to-mouth policy where possible. Chartering on the north-east coast has been affected by the tactics of the War Trade Committee and by the congestion at some of the North French and Bay ports. South American rates are hardening, but the supply of tonnage in South Wales is ample. The Tyne and Wear coal markets have been influenced by the factors alluded to above, and little forward business has been transacted. Some steamers have been stemmed for the White Sea. Lancashire house coal is a short supply, but the demand does not surpass the normal summer level. The coastwise trade is brisk, and slacks continue scarce. The West Yorkshire pits have worked better, but prices show a steady tendency to advance. The bulk of the output has now been placed, and consumers of manufacturing sorts are unable to fill their require- ments. South Yorkshire hards have stiffened, but their position is largely governed by the facilities for obtaining export licences. Steam nuts • are very scarce, house coals go off steadily, and gas coal stocks are practically non-existent. Coke is as strong as ever. The Derbyshire pits are very actively employed. At Cardiff the market has been irregular owing to the uncertainty prevailing as to the labour situation. The sporadic stoppages have hardened prices, but the order books of many collieries are full for weeks ahead. Bituminous coals are very slow, with prices uncertain. Patent fuel is strong, but coke is easier. In the west of Scotland trade is quiet, and there is a slackened demand for all but the best sorts. The licence difficulty is the ruling factor on the east coast. In the House of Commons on Wednesday, Mr. Runciman said returns furnished by London coal merchants showed that at the end of May the amount of coal at London depots was greater than a year ago. Particulars for the end of June were not yet available. With reference to the fixation of maxima prices, he hoped to be in a position to make a statement to the House very shortly. Matters of great importance to the coal trade and consumers had had to be dealt with by the Government during the past few weeks, which had unavoidably delayed the steps in contemplation for dealing with prices.