968 THE COLLIERY GUARDIAN. May 7, 1915.' CONTENTS. Editorial Article :— page The Coal Trade and National Industries .... 969 Wages and Exports'......................... 969 Articles :— The Ovens and Recovery Plant of the Team By-Product Coke Company Limited .......... 957 Coal Waste in Canada—and its Conservation Problem .................................. 961 Hydaulic Goaf Packing..................... 962 Kep Gear at a Midland Colliery ............. 963 Report on the Explosion at the Hojo Colliery, Japan ................................. 964 Mining and Other Notes...................... 965 Trade and the War........................... 966 Obituary ................................. 967 The German and Austrian Coal and Iron Trades ... 967 The War Bonus ............................ 974 Regulators for Rescue Appliances ........... 975 The Prohibition of Coal Exports ............ 978 Book Notices............................... 978 Labour and Wages........................... 978 Open Contracts........................... 979 The Acquisition of Enemy Patent Rights...... 980 The Freight Market ....................... 980 Abstracts of Patent Specifications Recently Accepted.................................. 980 New Patents Connected with the Coal and Iron Trades ................................... 984 Government Publications .................... 984 Publications Received ...................... 984 Catalogues and Price Lists Received......... 984 Current Science and Technology . ............... 966 Notes from the Coalfields ...................... 975 Law Intelligence ............................... 977 Coal, Iron and Engineering'Companies ........... 979 The Coal and Iron Trades.................... 970—974 The Tin-plate Trade ........................ 974 The By-Products Trade ...................... 974 The London Coal Trade ..................... 974 Letters to the Editors:— Mine Officials and Certificates ............ 975 Miscellanea :— Grimsby Coal Exports ....................... 961 New Demurrage Regulations................. 963 Manchester Geological and Mining Society—Welsh v. American Coals ........................ 965 The Supply of Gas and Industrial Fuel....... 967 Immingham Co SECRETARY, Clarence Chambers, Gloucester. The Oldest Diamond Drill Company. Established 1872. BORING fob yj im:i:ai>. SPEED AND CERTAINTY. CYLINDRICAL “ CORES.” THE AQUEOUS WORKS and DIAMOND ROOK-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 Boring for WATER. The Cambrian School of Mines, CEMETERY ROAD. PORTH, GLAM. An University Training at Your Own Home. Lessons and Instruction by Post for candidates for FIRST and SECOND Class Mine Managers’ and Mine Surveyors’ Home Office Examinations; Surveying and Electrical Engineering for London City Guild’s Examina- tions ; also A.M.E.E. Examinations and Government Inspectors’ Exams. Candidates for the above write without delay for free Syllabus, and book of Previous Examination Questions. (Dept. C.) CAMBRIAN MINING SCHOOL, PORTH, Glam. PATENT COAL DRIER. Machinery for Briquetting Peat, Lignite, Coke, Cc Iron, Copper, Nickel, Cement; Also Sawdust, Waste Cereals, Offals, Sewage. Briquette Machinery Ltd 161, Water Lane, LEEDS. The UNIVERSAL MINING SCHOOL (Estab. 1883) is conducted by T. A. SOUTHERN (late H.M.I.M.) and H. W. HALBAUM (Greenwell Medallist), men qualified to prepare you for the highest mining positions. U.M.S men obtain and hold nearly all the best posts. For example, 50 of H.M. Inspectors are U.M.S. men. Lessons by post only. Fees postponable during the war. Particulars on application. Syllabus and advice free. THE U.M.S., 50, Connaught Rd., CARDIFF. YEADONS’ LATEST PATENTED BRIQUETTE MACHINERY, For Coal, Coke, Iron and other Ores. YEADON, SON & CO., Engineers, LEEDS, Have a World-wide Reputation, and 38 Years’ Experience. They have supplied MORE BRIQUETTE PLANTS than any other firm in this country. STEEL Rails Roof Bars Pit Props Arches For COLLIERIES V ■? and WORKS. THUS W. WARD Ltd., Albion Works, SHEFFIELD. TRY US, ------- Books on Goal Mining Specimen copies can be seen at the Offices of the “ Colliery Guardian.” Analyses of British Coals and Coke. By Allan Greenwell, F.G.S., and J. V. Elsden, F.G.S., D.Sc. (Lond.) .........10 O Annals of Coalmining: and the Coal Trade. By R. L. Galloway. • First and Second Series, 16s. each net, or the two volumes together ...................................... net 25 0 Coal and Coalmining;. By the late Sir Warington W. Smyth. Revised and extended by T. Forster Brown ... (postage extra) 3 6 Coal-Cutting- by Machinery in the United Kingdom and America. By Sydney F. Walker and A. S. E. Ackermann. Two vols,, 10s. net, or separately. ................ 5 O Coal Dust Experiments, British. A Record of the First Series of Experiments conducted by the Committee appointed by the Mining Association of Great Britain ... (by post, 10s. 7d.) 10 0 Coal Dust Experiments, French. Abstracted Translation. (By post. Is. IJd.) .................................. 1 0 Coal Dust Experiments, American. Abstract. (By post, Is. Ijd.) 1 O Coal Dnst Experiments, Austrian. Abstracted Translation. (By post, Is. lid.) .................................. 1 O Coal. Being: a Digest of Evidence given before the Royal Commission on Coal Supplies. Edited by Allan Greenwell, F.G.S., Assoc. M.Inst. C.E. Complete in three vols., bound in cloth........... .................................. net 40 o Coal Trade (History of). By R. L Galloway ... ... ... 1 O Colliery Management (Some Notes on). Series l,6d., Series 2 0 6 Colliery Manager’s Calculator. By W. Fairley ... ... ... 2 O Colliery Manager’s Catechism. By W. Fairlev .............. 2 O Colliery Manager’s Handbook. By Caleb Pamely (postage extra) ..................................... ... net 25 o Mechanical Engineering of Collieries.' Bv T. C. Futers. Vol. 1. 21s. net; Vol. 2, 10s. 6d. net; Supplementary Vol., 10s. 6d. net (postage extra). Miners’ Nystagmus: Its Causes and Prevention. By T. Lister Llewellyn, M.D , B.S. (Lond.) ......(post free) 6 3 Mine Surveying (Treatise on). By Bennett H. Brough ... 6 O Mining Formulae. By T. A. O’Donahue, M.E., F.G.S., &c.,Cloth 10 6 Also in five parts, paper covers ..............each 1 6 Practical Coalmining. By T. H. Cockin .................... 4 6 Practical Stone Quarrying. By A. Greenwell, Assoc. M.Inst.C.E., and J. V. Elsden, D.8c.( bond.), F.G.S........... net 12 6 Recovering Coalmines after Explosion and Fires. By W. E. Garforth ... .......... ........ ... Cloth 1 6 Ventilation (Colliery). By J. Stanley James... ... ... ... 2 O Ventilation Made Easy. By W. Fairley ... ............ 0 6 THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C. Geo. N. Dixon & Co., 43, Castle Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant. yXTanted, Colliery Manager with First- V Y class Certificate, to act under Agent; experience in Silkstone and Parkgate seams and a knowledge of coabcutting, compressed air and longwall working.—Apply, stating age, experience and salary required, Box 6058, CollAtrt Guardian Office, 30 & 31, Furnival-street, Holborn, London^E.C. J. W. BAIRD AND COMPANY, PITWOOD IMPORTERS, WEST HARTLEPOOL, YEARLY CONTRACTS ENTERED INTO WITH COLLIERIES. OSBECK & COMPANY LIMITED, PIT-TIMBER MERCHANTS, NEW0A8TLE-0N-TYNE. SUPPLY ALL KINDS OF COLLIERY TIMBER. Telegrams—“ Osbecks, Newcastle-on-Tyne.” *** For other Miscellaneous Advertisements see Last White Page. ©lie (Blfiertj (Suaulian 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. LONDON, FRIDAY, MAY 7, 1915. The London coal trade is quiet, especially for household qualities. Colliery prices are with diffi- culty maintained. Public prices were reduced Is. per ton from May 1. Manufacturing qualities are firm, and all kinds of smalls are in good demand. The warmer weather and the increasing length of the days has considerably affected the buying. Freights also are down. The coal trade during the week has been domi- nated by uncertainty. The doubts as to exports restriction, and as to the wages question have caused both buyers and sellers to be cautious. Freight rates have taken another turn—this time downwards. The forward business on the Tyne and Wear has been very small, and the prompt markets very dull. The very mild weather with which we have been favoured during the past few days has not been without its effect on the household coal trade. Throughout Lancashire, Yorkshire and Derbyshire a slackening off is noticeable, but in all cases the' demand for industrial fuel maintains its strength. Owing to the abnormal conditions governing the Cardiff market, “outside” transactions are still of extremely small dimensions, and quotations are merely nominal. A quieter state of affairs exists in the Scottish coal trade, probably as a result of the warmer weather. The Board of Trade announce that the export of coal and coke to neutral countries will be prohibited by an Order which will operate on the 13th inst. Licences will be granted in some cases. Not all colliery companies are making high profits. The directors of the Weardale Steel Coal and Coke Company are unable to announce the usual half year’s dividend on their preferred ordinary shares. Sinking operations carried on during the past three years by the Bossington Main Colliery Company have now been rewarded by the reaching of what is said to be a 7 ft. 6 in. seam of excellent coal. The London County Council have instituted new by-laws providing that metal tablets stating the price of coal shall be affixed to all vehicles carrying coal for sale, and prescribing that it shall not be sold at a greater price than the figure on the tablet. A paper on “ Thermal Efficiency of Mining Steam Plants” will be read by Mr. J Drummond Paton, on Tuesday, before the Manchester Geological and Mining Society, at Manchester. Mr. John Gerrard, H.M. inspector of mines for the Lancashire, North Wales, and Ireland Division, has just retired. The appeals in the prosecution against the owners and management of the Senghenydd explosion cases were heard in the Divisional Court on Wednesday. The case against the manager, regarding accumula- tion of dust on floor and sides, was dismissed, it being thought by their lordships that reasonable precautions had been taken.