914 THE COLLIERY GUARDIAN May 2, 1913. CONTENTS. PAGE Editorial Article :— Mineral Bents ..............:............... 915 Articles :— Advantages of the Direct Method of Ammonia Eecovery..................................... 903 The Third Report of the Explosions in Mines Committee................................... 905 Funds of Trade Unions....................... 907 Coal Sampling and Analysis ................... 907 Birchenwood Colliery.......................... 908 Labour and Wages ............................. 916 Obituary...................................... 917 Notes from South Wales........................ 919 Mining and Other Notes ....................... 920 Mineral Owners’ Association of Great Britain . 921 The Imperial College of Science and Technology ... 922 Conciliation and Arbitration.................. 922 Open Contracts ............................... 923 The Freight Market ........................... 923 Abstracts of Patent Specifications Becently Accep ted 926 Catalogues and Price Lists Beceived........... 930 New Patents Connected with the Coal and Iron Trades....................................... 930 Publications Beceived ........................ 930 Government Publications .................... 930 Law Intelligence ................................. 917 Continental Mining Notes ......................... 917 Indian and Colonial Notes ........................ 922 Coal, Ibon and Engineering Companies ............. 924 The Coal and Iron Trades ............... 910—913, 918 The Tin-plate Trade .......................... 913 The By-Products Trade ........................ 917 The London Coal Trade ........................ 918 Letters to the Editor :— Explosions in Coalmines..................... 922 Miscellanea :—■ Partnerships Dissolved—Hull Coal Exports ... 905 Grimsby Coal Exports ......................... 907 North Wales Permanent Belief Society.......... 916 British Electrical and Allied Manufacturers’ Association—Manchester Geological and Mining Society...................................... 917 Doncaster and the Coal Trade—Coal Struck near Newark—Safety Lamp Glasses................... 921 Coal Trade Benevolent Association............. 922 A Scottish Chairman on the Minimum Wage...... 926 SUBSCRIPTIONS. The Colliery Guardian is published at 2.30 p.m. on Friday, and includes the latest intelligence. The Annual Sub- icription is 24s.; but if paid in advance, 21s. In both cases the charge includes delivery free by post in the United Kingdom. Post free and prepaid to Foreign Countries, jEI 7s. 6d. ADVEBTISEMENTS. ADVEBTISEMENT DEPABTMENT. H. Gbeville Montgomery, 43, Essex-street, Strand, London, W.C., and 27, Brasenose-street, Manchester. Advertisements are inserted on the last white page and leader page at the following rates:— Situations Vacant and Wanted : One Penny per word (which must be prepaid), minimum 2s. 6d. Other Advertisements : One insertion ... 10s. Od. 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. CONTEACT ADVEBTISEMENTS. Prices eob SPECIAL POSITIONS on application. Prices for OBDINABY POSITIONS Single Column (3 inches wide): For 52 insertions 2s. 6d. '1 „ 26 „ 3s. Od. f ,, 13 ,, 3s. 6d. 3 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. Miscount* or Commissions are paid to Auctioneer* and Advertising Agent*. (A Classified List appears on page 932.) •#*The offices of this Journal are at 30 & 31, Furnival-street, Holborn, London, E.C. Cheques, &c., to be made payable to the Colliery Guardian Co. Limited. All remittances should be crossed * Co. Postage stamps should not be remitted for amounts exceeding one shilling. Established 1866. Patents, Designs and Trade Marks. Harris and Mills, Chartered Patent Agents, 34 and 35, HIGH HOLBORN, LONDON, W.C. Telegraphic Address—’* Privilege, London.” Tel. No. Holborn 2763. Circular of useful information and prices for British and Foreign Patents post free. Chart of 187 Mechanical Motions with description of each, post free 6d. VENTILATING FANS AND ENGINES. Bee Advertisement appearing on front Cover of alternate Woeki. THE WADDLE PATENT FAN AND ENGINEERING CO. LTD. Llahmore Works Llanellv. TnC! F0E minerals, Ji VJxJthXlV/JU-ImO wateb and beine Boreholes for Prospecting in Underground Workings a Speciality. VIVIAN’S BORING COMPANY, PARKSIDE, CLEATOR MOOR. OVER 82 MILES OF BORINGS COMPLETED. Established 40 years. Largest experience. Telegrams—“ Vivians, Parkside, Cleator Moor.” BORING for MINERALS, &o. Solid Specimens of the Strata obtained. Established 1888. Reference if required. Apply to --- Work «“a«nteed. J. S. DAVIDSON & SON, St. Bees, CUMBERLAND. YEADONS’ LATEST PATENTED BRIQUETTE MACHINERY, For Coal, Coke, Iron and other Ores. YEADON, SON & CO., • • • Engineers, LEEDS. World-wide Reputation. 35 Years’ Experience. AND ACCESSORIES. WAGONS ALWAYS IN STOCK. QUICK DESPATCH. THO? W. WARD Ltd., Sheffield. Telegrams—" Forward.” Telephones—4321 (6 lines). Th fl H W Q is conducted by 1I1G U.lll.V. T. A. SOUTHERN H. W. HALBAUM (Estab. 1883). (late H.M.I.M.) (Greenwell Medallist) men qualified to prepare you for the highest mining positions. The U.M.S. is the sure road to promotion. Employers know that OUR PBACTICAL TRAINING FITS MEN FOR POSITION. That is why U.M S. men obtain and hold nearly all the best positions. 42 of H.M. Inspectors are U.M.S. men. LESSONS BY POST only. Syllabus free. Dept. A3, The U.M.S., CARDIFF. PROFESSOR HALDANE'S New Portable Apparatus for Routine Firedamp Estimations; and Apparatus for Approximate Determination of Oxygen by Flame Test. Sole Mahers- SIEBE, GORMAN & CO. LTD., “NEPTUNE” WORKS, AND 187, WESTMINSTER Bridge Road, London, S.E...................... ALSO MANUFACTURERS OF Rescue Apparatus (Fleuss-Davis Patents), First-Aid Boxes, Reviving Apparatus, Oxygen Compression Pumps, Electric Lamps, &c., &c. Demy Octavo, 176 pages, Cloth. Price 6s. 3d. 45 Original Photographs and Diagrams. (post free). Miners’ Nystagmus: Its Causes and Prevention, By T. LISTER LLEWELLYN, M.D., B.S, (Lond.), &c. WITH A PREFACE BY Professor J. S. HALDANE, F.R.S., M.D., AND A LEGAL APPENDIX BY DOUGLAS KNOCKER, M.B., Barrister-at-Law. CONTENTS. Description of the Eye—Anatomy : Physiology—(1) General Description of the Disease—(2) Frequency and Eeaulting Incapacity—(3) Historical Account of the Disease and Theories of its Causation—(4), (5) and (6) Conditions Determining the Occurrence of Nystagmus—(7) Diagnosis and Prognosis—(8) The Etiology of Nystagmus—(9) Pre- ventive Measures and Treatment—(10) Summary and Conclusions — With Appendices: Legal Information — Glossary—Beferenees and Bibliography—The Effects of Deficiency of Oxygen on the Light of a Safety Lamp— Test of Ceag Lamp. THE COLLIEEY GUABDIAN COMPANY LTD., 30 & 31, Furnival Street, Holborn, London, E.C. Lattice Girder Bridge as per illustration, 96 ft. long, 7 ft. by 7 ft. inside, in three lengths, has been across L. & N.M'. Railway, FOR SALE.—Apply, LEAMORE BRICK CO., Walsall. ABT 13 DARLINGTON’S HANDBOOKS. “Nothing better could be wished for.”—British Weekly. “ Far superior to ordinary guides.”—Daily Chronicle. Visitors to London (and Residents) should use DARLINGTON’S “ Very emphatically tops them all.”—Daily Graphic. T “A brilliant book.”—The Times. “ Particularly good.”—Academy. By E. C. COOK and E. T. COOK, M.A. ENVIRONS. 5th Edition, Revised 30 Maps and Plans 80 Illustrations. “ The best Handbook to London ever issued.”—Liverpool Daily Poet. 80 Illus. Maps & Plans, 5s. NORTH WALES. 50 Illus., 6 Maps, 2s. 6d. N. DEVON & N. CORNWALL. 1OO Ulus. Maps & Plans, 5s. DEVON & CORNWALL. 50 Illus., 6 Maps, 2s. 6d. S. DEVON & S. CORNWALL Is* The Hotels of the World. A Handbook to the Leading Hotels throughout the World. Visitors to Edinburgh, Glasgow, Brighton, Eastbourne, Hastings, St. Leonards, Worthing, Bournemouth, Exeter, Torquay. Paignton, Exmouth, Sidmouth.Teignmouth.Dawlish, Plymouth, Dartmouth, Dartmoor, Exmoor, Falmouth, The Lizard. Penzance, Land’s End, Scilly Isles, St. Ives, New- quay, Tintagel, Clovelly, Ilfracombe, Lynton, Minenead, Bideford, Wye Valley, Severn Valley, Bath, Weston-super-Mare, Malvern, Hereford Worcester, Gloucester, Cheltenham, Llandrindrod, Bala, Brecon, Ross, Tintern, Llangollen, Aberystwith, Towyn, Barmouth Dolgelly, Harlech, Criccieth, Pwllheli, Llandudno, Rhyl, Conway, Colwyn Bay, Penmaenmawr, Llanfairfechan, Bangor, Carnarvon, Beddgelert, Snowdon, Festiniog, Trefriw, Bettws-y-coed, Norwich, Yarmouth, Lowestoft, Norfolk Broads, Buxton, Matlock, The Peak, Isle of Wight, and Channel Islands should use Darlington’s Handbooks Is. each. Post free from Darlington & Co. Llangollen. Llangollen: DARLINGTON & CO. London: SIMPKINS Paris and New York: BRENTANO’S. The Railway Bookstalls and all Booksellers. THIRD EDITION. Croutn 8vo.t cloth, lettered. 114pp. Prioe2c. /Colliery Ventilation. By J. Stanley James, M.E. The chief object of this small treatise is to afford some assist- ance 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. Published by The “COLLIERY GUARDIAN,” 30 & 31, Furnival Street, Holborn, London, E.C. Tndian Mines Act, 1901, with a Digest of JL the Act, a reprint of the Act with explanatory notes, an appendix con- taining forms, a model code of Special Rules. &c.. by W. H. Pickering* Chief inspector of Mines in India, and W. Graham, Barrister-at-Law.— Price 10s. post free from Messrs. S. K. LAHIRI & CO., 54, College- street, Calcutta; or Colliery Guardian Office. 30 & 31. Furnival-street, Hoi- born. London. E.C. Q ales Agency. —A Firm of local merchants, k / established some years, desire selling agency in the Birmingham district for meritorious house, manufacturing and anthracite coals and foundry coke, or would factor on suitable terms.—Apply, Box 5223, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. A thoroughly experienced Colliery MANAGER is at liberty for immediate re-engagement; accus- tomed to all phases of the work at modern mines.—Box 5229, Colliery Guardian Office, 30 & 31, Furnival street, Holborn, uondon, E.C. AVranted for a Colliery near Bristol, V V eight hundred yards good second-hand four inch cast iron SOCKET PIPES.—State price to “A.,” Box 5230, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. VVyanted, Underground Pump, 10/12,000 7 V gallons capacity, about 300 ft. head, suitable for electric belt drive or direct.—Full particulars to MYNYDD MAEN COLLIERY CO. LTD., Pontypool. rP° let, about 6,00i) acres of Anthracite, a STEAM and BITUMINOUS COALS in the western division of the South Wales coalfield : the property is intersected by two railways and has a water frontage : only principal* dealt with.—Apply to G. GARNONS WILLIAMS. Esq.. Ashburnham Estate Office, Burry Port. Carmarthen- shire ; or to JOHN ROBERTS, Esq., Civil and Mining Engineer, Swansea. YA/ranted to Buy, a thorough good York- ▼ V shire Colliery, price up to £3C0,000 ; immediate inspection.— Particulars in strict confidence, JEYES, Surveyor, Sheffield. Institution of Mining Engineers.—Com- plete set of Transactions, Vols. 2 to 43 inclusive, with general indices and a large number of duplicates, for sale; offers invited.—Box 5231, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. Qinking Contract.—Wanted, Tenders for deepening a ten feet Shaft about 350 yards.—For specifications, &c., apply the SECRETARY, Dunkerton Collieries Ltd., near Bath. TO COLLIERY PROPRIETORS AND OTHERS. 'Pho Corporation of Birkenhead are pre- JL pared to receive TENDERS for the supply of WASHED SLACK or WASHED SMALL COAL, delivered at the Corporation’s Electricity Generating Stations, situate in Bentinck-street, Craven-street, and New Chester-road respectively, for a period of twelve months commencing the 1st day of July, 1913, and terminating on the 30th day of June, 1914. Forms of tender, together with any further information, may be obtained, from Mr. W. Wyld, M.I.M.E., M.I.E.E., Borough Electrical Engineer, Craven-street, Birkenhead. Tenders, stating the price per ton delivered, sealed and endorsed “ Tender for Fuel for Electricity Works,” must be sent in so as to reach me not later than 5 p.m. on Monday, the 19th day of May, 1913. All deliveries must be made from time to time according to the require- ments of the Borough Electrical Engineer. The person or firm whose tender may be accepted will be required to enter into a contract containing a clause as to the payment of the rate of wages- and the observance of the hours of labour recognised and agreed upon between the trades unions and the employers in Birkenhead or in the locality in which the work for carrying out the contract is executed, as the case may be. The Cor Dotation do not bind themselves to accept the lowest or any tender, and reserve to themselves the right of accepting the whole or any portion of a tender, and will not make any allowance for or in respect of any expenses incurred by the parties tendering. Town Hall, By order, Birkenhead, J. FEARNLEY, April 29th, 1913. Town Clerk. THE METROPOLITAN BOROUGH OF HACKNEY. TENDERS FOR STEAM COAL. H^he Council of the Metropolitan Borough JL of Hackney are prepared to receive TENDERS from colliery com- pames or their accredited agents for the supply and delivery at the Hackney Public Baths, Lower Clapton-road, N.E , or at a specified railway siding, of such quantities of HARD STEAM COaL as they may require during a period of twelve months from the 10th May, 1913. The quantity us-^d during the period is estimated to be about 1,500 tons. The Contractor will be required to enter into a contract in the form of that attached to the form of tender. In the case of all workmen employed by the Contractor, the Contractor will be required to pay wages not less and to observe hours of labour not more than those recognised by the trade unions and in practice obtained in the colliery district where the coal is produced. Tenders (on forms which may be obtained from the undersigned) enclosed in envelopes, sealed with sealing wax, and endorsed "‘Coal Supply to the Baths,” must either be delivered by the person tendering or an authorised representative, to the Chairman, at a meeting of the Tenders Committee of the Council, to be held at the Town Hall, Mare-street, Hackney, on Thursday, the 8th May, 1913, at half-past six o’clock p.m., or sent by regis- tered post, addressed to the Chairman of the Tenders Committee, at the Town Hall, so as to be delivered not later than the time stated. Tenders sent otherwise will not be considered. The Council do not bind themselves to accept the lowest or any tender. Town Hall, Hackney, N.E., W. A. WILLIAMS, April, 1913. Town Clerk.