82 THE COLLIERY GUARDIAN. January 10, 1913. COHTEHTS. PAGE Editorial Article :— The Bentley Colliery Case ................... 83 Articles :— The Flameless or “Convergent” Combustion of Gases ...................................... 69 Output and Value of Coal in 1911............. 71 Mine Fires................................... 73 The Ventilation of the Bentley Colliery ..... 73 The Coal Trade of 1912....................... 74 Colliery Accidents .......................... 77 Labour and Wages ............................ 84 Notes from South Wales....................... 87 Obituary..................................... 87 Mining and Other Notes ...................... 88 Shipments of Coal and Coke Coastwise and Foreign during 1911 and 1912 ....................... 89 The Freight Market........................... 89 Open Contracts .............................. 89 Coal and Coke Exported from Ports in England, Scotland and Wales ......................... 90 Coal and Coke Shipped for London and Other Ports in the United Kingdom .................. 90 Exports of Coal, Coke and Manufactured Fuel from the United Kingdom ...................... 91 Abstracts of Patent Specifications Recently Accepted 92 New Patents Connected with the Coal and Iron Trades...................................... 94 Publications Received ....................... 96 Government Publications ..................... 96 Parliamentary Intelligence ...................... 77 Coal, Iron and Engineering Companies ............ 70 The Coal and Iron Trades...................... 78—81 The Tin-plate Trade ......................... 81 The By-Products Trade ....................... 86 The London Coal Trade ....................... 86 Letters to the Editor :— Colliery Managers* Examinations — Controlling Gear on Winding Engines — Comparison of Rescue Apparatus of the Injector and Non- Injector Types................................ 77 Miscellanea :— Calendars—Colliers and Medical Relief........ 70 Grimsby Coal Exports—Cruelty to Pit Ponies .. 72 Hull Coal Exports—North Staffordshire Institute of Mining and Mechanical Engineers — Man- chester Geological and Mining Society......... 73 Partnerships Dissolved—Miners’ House Coal.... 86 Institution of Mechanical Engineers — Renewed Activities in the Barnsley Coalfield ....... 94 SUBSCRIPTIONS. The Colliery Guardian is published at 2.30 p.m. on Friday, and includes the latest intelligence. The Annual Sub- scription 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, £1 7s. 6d. ADVERTISEMENTS. ADVERTISEMENT DEPARTMENT. H. Greville 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. CONTRACT ADVERTISEMENTS. Prices for SPECIAL POSITIONS on application. Prices for ORDINARY POSITIONS :— Single Column (3 inches wide): For 52 insertions 2s. 6d. _ aa o t P°r insertion for each ,, 26 ,, 3s. Od. f , ., „ 13 „ 3s. 6d. 5 meh m depth. Double Column (6 inches wide), double the above rates. Three Columns (9 inches wide), three times the above rates. Discounts or Commissions are paid to Auctioneers and Advertising Agents. (A Classified List appears on page 98.) *#*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 a 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 Week*. THE WADDLE PATENT FAN AND ENGINEERING CO. LTD. Llanmore Works Llanelly. THQ F0R minerals, I5VJlVJjJ-CLV/1jJ2JO water and brine 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.” The Cambrian School of Mines, CEMETERY ROAD, PORTH, GLAM. Principal: WILLIAM THOMAS, M.Inst.M.E., M.B., Society of Arts. A SCHOOL of Unequalled Reputation. No Branches. No Agents* Students get their full money’s wtorth in Lessons, Specimen Answers and Personal Instruction. Influential Employers give preference to Students prepared at this School. Last Inspectorate Exams., 5 Students, passed and appointed. LESSONS BY POST for Mine Officials and Mining Students, &c. The most accurate way of estimating a Tutor’s success is by the per- centages of his passes. At the 1912 Cardiff Mine Managers’ Home Office Exams. 172 Students sat from this School, 140 of them were successful. At Glasgow Mining Exam. 38 Cambrian Students sat, the 38 were successful. Write immediately for free Booklets, &c. Secretary: Oambrian Mining School, Glanffrwd, Forth, Glam. BORING fob MINERALS, *o. Solid Spioimxns of the Strata obtained. Established 1888. Reference if required. Apply to ___ Work guaranteed. 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. v WAGONS ALWAYS IN STOCK. QUICK DESPATCH. THO:S W. WARD Ltd., Sheffield. Telegrams—“Forward.” Telephones—4321 (6 lines). 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 Resulting 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—References and Bibliography—The Effects of Deficiency of Oxygen on the Light of a Safety Lamp- Test of Ceag Lamp. THE COLLIERY GUARDIAN COMPANY LTD., 30 & 31, Furnival Street, Holborn, London, E.C. Examination of Flame Caps IN SAFETY LAMPS. Simplest and Most Efficient Apparatus FOR MIXING AIR AND GAS IN DESIRED PERCENTAGES IS MANUFACTURED BY BAIRD & TATLOCK, 45, Renfrew Street, GLASGOW, And at Manchester, Liverpool Edinburgh. Write to the above address for illustrated descriptive pamphlet free on application or see description in “ Colliery Guardian” of Sept. 27, p. 635. Surveyor Wanted; state age, experience, qualifications, and give two references.—Apply, P. MUSCHAMP, New Hucknall Colliery, Mansfield. lectrician (Working) Wanted for colliery, D.C. plant, and competent under new rules ; state age, experience and wages.—Apply, Box 5070, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. anted at once, Under-Manager for collierv in the Midlands where developments are now in progress; present output 400 to 450 tons per day; knowledge of electric coal cutting is desirable.—Apply, stating age, experience, and giving reference or testi- monials, to Box 5073, Collierv Guardian Office, 30 & 31, Furnival-street, Holborn, London. E.C. Assistant Manager with Colliery Mana- ger’s first-class certificate required 'ey firm controlling large coal interests in Bengal : single, not exceeding 30 years of age, thoroughly practical; four years’agreement, commencing with £280. rising to £360 a year; good prospects for good man: free furnished quarters, second-class passage out ana home.—Write with full particulars, to “C. B.,” care of J. W. Vickers & Co. Ltd., 5, Nicholas-lane, E.C. Engineering Company require Repre- SENT ATI VE (certificated Colliery Manager preferred), with knowledge of coal cutting machines ; able to invest from £1,000 to £3,000 in company : excellent opportunity, exceptionally good prospects.—Address. “ REPRESENTATIVE,” Wm. Porteous & Co., Glasgow. Wanted, an Assistant Colliery Surveyor for a group of thin mines in Lancashire.—Apply, stating age, qualifications, and salary required, to Box 5075, Colli try Guardian Office, 30 & 31, Furnival-street, Holborn, London. E.C. Certificated Manager Wanted for North Staffordshire colliery.—Apply, stating age, experience, and salary required, to Box 5076, Colliery Guardian Office, 30 & 31, Furnival-street. Holborn, London, E.C. Wanted,First-class Certificated Manager to take charge of a Lancashire collierv ; salary £250 to £303 per annum, with house, &c.—Apply, with reference, stating age and experience, Box 5077. Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. To Colliery Surveyors.—Wanted, a good reliable experienced SURVEYOR to act under a Chief Surveyor; must be a good draughtsman and thoroughly reliable.—Applications giving age, experience, wages and references, to GENERAL MANAGER, Cannock and Rugeley Collieries, Hednesford. Assistant Colliery Manager with First- class certificate required for the East; single, age should not exceed 35.—Address, “ Z. S. 236,” care Deacon’s Advertising Offices, Leadenhall- street, London, E.C. >1/ anted, Mining Engineer to act as V V AGENT of the Britannic Collieries, Gilfach Goch; preference will be given to one who has had practical experience in the laving out of new collieries.—Apply, stating age, wages, and refei ences, to BRITANNIC MERTHYR COAL CO. LTD., General Offices, Llwynypia. purveyor, 24 (Certificated) requires situation ; experienced in theodolite and fast needle surveying, accurate planman; good knowledge of colliery office work.—Box 5072, Coiii/ry Guardian Office, 30 & 31, Furnival street. Holborn, London, E.C. The Second Annual Dinner of the Past and Present Students of the Mining Department, Leeds University, will be held at Hotel Metropole, at 6.30 on January 18th, 1913.—Tickets can be had on application to BARKER & ROBSON, 144, Tempest-road, Beeston Hill, Leeds. The Directors of the Powell Duffryn Steam Coal Co. Ltd. invite TENDERS for the supply of the under- mentioned STORES from the 1st April, 1913. No. 16. Grease and Oils. No. 18. Paints and Drysalteries. Forms of tender and full particulars can be obtained on application to the Stores Manager, Aberaman Offices, near Aberdare. Samples to be sent addressed to the Powell Duffryn Steam Coal Co.’s Laboratory, Aberaman, so as to be received not later than February 1st, 1913, and tenders to be addressed to the Directors of the Powell Duffryn Steam Coal Co. Ltd., 101, Leadenhall-street. Loudon, E.C., and posted so as to be received not later than 10 a.m. on Monday, 10th March, 1913. The ■ Directors do not bind themselves to accept the lowest tender, and they reserve to themselves the right to accept any part of a tender. By order, 101, Leadenhall-street, H. B. CLARKE, London, E.C. Secretary. BOROUGH OF BEXHILL. ELECTRICITY DEPARTMENT. I'Uie Bexhill Corporation are prepared to receive TENDERS for the supply and delivery on their siding at the Electricity Works of one thousand tons of TIB'•HELF PEAS or SHIPLSY PEAS or similar sized coal of equal quality to be delivered in such quantities weekly as the Engineer shall from time to time arrange, the whole to be delivered within six months of the date of the contract. Colliery certificates together with invoice and weight to be delivered with each consignment. Payment of quantity approved will be made monthly upon the certificate • of the Engineer. Tenders to be received at the office of the Town Clerk not later than 12 noon Saturday, 18th January, 1913. Electricity Works, W. T. LE FEUVRE, Bexhill-on-Sea, Borough Electrical Engineer. January 8th, 1913. For Sale, just rebuilt by the makers, 13 in. 6 wheels coupled LOCO., by Hunslet Engine Co..- also 12 in. 6 wheels coupled LOCO., Special Class L. just rebuilt by makers. Manning Wardlo & Co.: both first class engines and equal to new.—Apply, CHAS. BAKER & SONS, Lockoford-lane, Chesterfield. 17fVB.H.P. Semi-portable Compound | V.Z Tandem Superheated Condensing STEAM ENGINE and BOILER for Sale ; al«o TURBINE PUMP, capacity 800 gallons per minute ag-dnst 450ft. Lead: aho a^out 210 tons of Spigoted, Socket, and Coated 12 in. diameter Cast Iron PIPES, 12ft. lengths; all above are oerfectlv new and have never yet been used.— Particulars and prices from Box 5071, Collierv Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. TP or Sale, quantity of Relayable Sleepers, JD CROSSING TIMBERS, and CHOCK WOOD — G. HOWARD, Metal Broker, Warrington. Win ted, four new or Second-hand SINKIN G KIBBLES, one cubic yard capacity, with bridle chains complete—Apply, SECRETARY. Dunkerton Collieries Ltd., near Bath. About 2 cwt. 1 in., i^in., l|in. Steam PACKING, various cores, for sale, cheap.—Box 5074, Colliery Guardian 30 & 31, Furnival-street, Holborn, London, E.C. O ail way Coal Wagons for Hire or Sale ; > V/ merchant has 50 8-ton Spring-buffers, immediate delivery : would divide.—Address, “ BUFFER,” c/o Gould’s Advertisement Offices, 54, New Oxford-street, London, W.C. For Sale, 2 Coils Electric Cable, size 7/12,1. ngth 110 yards in each coil, never opened: 2,500ft. of Wrought Iron S earn Pipes, liin. diameter, nends and couplings, all equal to new, clear cheap.—GEORGE GOODWIN, Stewart-street, Stockport. Wanted, one Steam Direct - current GENERATING SET (new or second-hand), about 400 kw. at 901b. steam pressure; Compound High SpQed Engine, forced lubrication; Traction Generator, 500 to 550 volts.— Full particulars to DEARNE VALLEY COLLIERY OO. LTD., near Barnsley. Wanted, Second-hand Electric Single DRUM HAULAGE, about 80 h.p. alternating current motor,. 50 cycles, 500 volts.—Particulars, &c., to Box 5078, Cohiety Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. Price One Shilling, Mounted and Varnished. MAP of England and Wales, showing Lines of Equal- MAGNETIC DECLINATION Corrected to January 1,1913; also Inspection Districts and Coalfields. THE COLLIERY GUARDIAN CO. LTD., 30 & 31. Furnival-street, Holborn, London, E.C.