438 THE COLLIERY GUARDIAN. March 2, 1917. CONTENTS. Editorial Articles :— Coal Field Economics ................................ Pit Timber..................... Articles:— The Cementation of Llay Hall Colliery Shafts ... Mining Accidents and Labour in 1915 ......... Employment of Boys at Mines ______.......... / Boiler Feed Water............. The G-ainey Non-Cumulative Visuai indicator ... ... Liquid Fuel and its Combustion .............. Safety Lamps in Mines................ ..."i"'/" An American By. Product Coking Plant ........ ....................... Coal Prices in Scotland............Z. ” ”...." Coal-Cutting Machinery in 1915 .................. Trouble Saver on Hope Haulage ....... The Control of Mines......_____L... Coal Traffic on Railways and Canals in 1915 ........ The American Coal Trade .................. Obituary....................’’’’’’ ' ’ ’’’ .. Trade and the War ... .7.’.7********’*"'"’’^"’’’ Mining Industry and Military Service ... Pitwood .............................. Maximum Coal Prices in France ............... • Labour and Wages...............____ ______ ’’’ ’ * Open Contracts ...................' The Freight Market __.................... ... Coastwise Shipments in January................ Abstracts of Patent Specifications Recently Accepted............................... New Patents Connected with the Coal and Iron Trades......................'.......................... Publications Received....................' Letters to the Editors :— Ventilation ..................................... The Coal and Iron Trades........... The London Coal Trade ............. The Tin-plate Trade.................... . . The By-Products Trade ............ Law Intelligence ............... Current Science and Technology..... Indian and Colonial Notes ........... Parliamentary Intelligence ......... Notes from the Coal Fields ... Coal, Iron and Engineering Companies Miscellanea Control of Mines—Tax on German Coal—Sale of Colliery Timber ...................................... ............................. Italy*s Need of Iron—Imprisoned in Pit Shaft ___ The Staffordshire Iron and Steel Institute—Miners* “Comb-Out** ....................... Coal Trade Benevolent Association........... ... ........................... Swedish Iron Ore ....................... Overcharge for Coal ................... Partnerships Dissolved—Trade Openings Abroad... . 429 . 430 . 431 . 431 . 432 , 433 . 431 431 435 435 435 436 436 437 437 437 437 444 441 441 447 447 44S 450 452 432 434 435 436 443 444 452 .... 436 ,440—444 ....... 440 ... 443 ... 444 ... 435 ... 436 ....... 437 ... 437 ... 445 ... 448 ______________________________________________ Offices for ADVERTISEMENTS and PUBLICATION— 30 & 31, Furnival Street, Holborn, London, E.C. CONTRACT ADVERTISEMENTS : Prices for SPECIAL POSITIONS on application. Prices for ORDINARY POSITIONS.:— Single Column (3 inches wide) : For 52 insertions 2s. 6d. *) , 26 gs qj / per insertion for each 13 3b. 6d. j inck in dePth- Double Column (6 inches wide), double the above rates. Three Columns (9 inches wide), three times the above rates. _______________________________________________ Established 1866. PATENTS, DESIGNS, and TRADE MARKS. ARRIS AND MILLS, Chartered Patent Agents, 34 and 35, HIGH HOLBORN, LONDON. W.C. Telegraphic Address—" Privilege. London.” Tel. No.—Holborn 2763. PATENTS. Advice Free. New Inventions, Designs, Trade Marks, carefully and promptly protected at low INCLUSIVE FEES. THE CONSULTING PATENT AGENCY (1880), 253, Gray’s Inn Road, London, W.C. Wanted.—Experienced Clerk, ineligible | | for the Army, one used to colliery work, and who can do short- hand and type-writing preferred. State, age, experience and salary required.—Apply, H. CRAWSHAY A CO. LTD., Cinderford, S.O., Glos Mining Surveyor Assistant, ineligible, able to survey and level, for group of collieries in Lothians — Apply, stating age, experience and salary expected, to DISTRICT MANAGER, Bathville Collieries, Armadale. rattice Cloth. — Gentleman Wanted with influence amongst colliery managers and proprietors, to sell BRATTICE CLOTH on good commission only .-Address, . FAIRCLOUGH & SONS, Bank-lane, Clayton, near Manchester. Assistants to Colliery Engineer.—Two good practical men wanted at once. Must be experienced with Ropes and Machinery on a large scale, above and below ground.—Apply with references, stating age, experience and wages required, SNEYD COLLIERIES LTD., Burslem, Stoke-on-Trent. /Colliery Enginewright Wanted. Must be competent mechanic. Good wage to suitable applicant.—Apply Box 6689, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn’ London. E.C. * TENDERS FOR STEAM COAL. The Guardians of the Poor of the Parish of St. Mary. Islington, invite TENDERS for the supply of about 1,030 tons of STEAM COAL, to be delivered as ordered at the Institutions and Offices of the parish, during the period to the 30th day of June, 1917 Printed forms of tender, which alone will be received, and which contain conditions of contract, must be obtained from the Clerk personally, or a stamped addressed brief-size envelope may be sent. Sealed tenders, endorsed "Tender for Coal,” and addressed to the Guardians, must be delivered at the undermentioned Offices, on or before TUESDAY, the 13th day of MARCH, 1917, and they will be opened at a meeting of the Guardians, to be held on THURSDAY, the 15th day of MARCH, 1917. The Guardians do not bind themselves to accept the lowest or any tender. Guardians’ Offices, (By Order) EDWIN DAVEY, St. John’s-road, Upper Holloway, N. Clerk. 27th February, 1917. VENTILATING FANS AND ENGINES. See Advertisement appearing on front Cover of alternate weeks. THE WADDLE PATENT FAN AND ENGINEERING CO. LTD. Llanmore Works Llanelly F0R minerals, WATER AND BRINE. Boreholes for Prospecting in Underground Workings a Speciality. VIVIAN’S BORING COMPANY, PARKSIDE, CLEATOR MOOR. „ r , OVER 88 MILES OF BORINGS COMPLETED. Established 44 years. Largest experience. Telegrams—“Vivians, Parkside, Cleator Moor.” PAGE 439 439 448 J. S. DAVIDSON & SON, St. Bees, CUMBERLAND. “CROWN” BOILER COVERINGS of Outstanding Superiority. 96 ; SAVING Intensest Heat cannot Impair. SUTCLIFFE BROS. ___________________________ BORING for MINERALS, &c. Solid Specimens of the Strata obtained. Established 1888. Work guaranteed. STEEL \ por C0LLiERIES Rails J V V and WORKS. Roof Bars I THO? W. WARD Ltd., Pit Props I Albion Works, A ■ " I SHEFFIELD. Arches I try us. — __________________________________ SMALL to obtain DISTILLED WATER for BATTERY ELECTROLYTE, Ac. Write—The Lawrence Patent Water Sterilizer Co. Ltd., Parliament Mansions, Westminster. RAILS RAILS ALL SECTIONS AND ACCESSORIES. . Also quantity F.B. suitable for bearers. Sleepers. Timbers. Switches and Crossings. Buffer Stops. Locomotives. Cranes. Wagons. ARMYTAGE & JONES Ltd., Sheaf Street, Sheffield. Bruce Peebles & Co- L,d- ELECTRICAL MACHINERY See our Illustrated Engineers, Edinburgh. Advt. last week. TO COLLIERY PROPRIETORS TIMBER MERCHANTS AND OTHERS. HEREFORDSHIRE, BRECONSHIRE AND RADNORSHIRE. Messrs. Stooke & Son are instructed to OFFER for SALE by AUCTION, at the Citv Arms Hotel. Hereford, on WEDNESDAY, the 14th day of MARCH, 1917, punctually at 2.30 o’clock, in suitable lots, subject to conditions of sale, valuable TIMBER and POLES, suitable for colliery purposes. For particulars, apply to— MESSRS. STOOKE St SON, Land Agents, Surveyors and Auctioneers, Hereford. For Sale.;—Air-receiver, 20 by 5, for 100 lb. pressure. A. UNDERWOOD, 3, Queen-street, E.C. STEAM ENGINES. ♦ VT°^ern Horizontal Cross - compound JLXJL- Engine, by Hayward Tyler, cylinders 16 in. and 26 in. diameter, 32 in. stroke, complete governor and flywheel, good condition; £300. Horizontal single cylinder Engine, by Hick Hargreaves, cylinder 18 in. diameter, 36 in. stroke, Corliss valve; £275. Horizontal single cylinder Engine, by Midland Railway Co., cylinder 18 in. dia., 26in. stroke, heavy flywheel; £120. JOHN FREDK. WAKE, DARLINGTON. For Sale.—Winding Engine, 14 in. cylinders, 24 stroke, 6 ft. drum, 2 ft. wide, and'capstan. A. UNDERWOOD, 3, Queen-street, E.O. FOR SALE. Four Hardy Patent Puncher Coal-cutting MACHINES.—Apply, Box 6688, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. TATanted, two 6/700-kw. Reciprocating ▼ V ENGINES and 3-phase GENERATORS, 440 volts, 50 periods. State name of makers, price, and where may be inspected.—Particulars ;o, Box 6684, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. SEMI-PORTABLE ENGINE. !v/Y-n.h.p. Compound Undertype Semi- Portable Engine, by Robey, h.p. cylinder 13 j in., 1 p. cylinder 23 in.j stroke 24 in., 140 lb. w.p., a very fine engine; price £725. JOHN FREDK. WAKE, DARLINGTON. For Sale.—Two New Steel Mining Ropes, 6,000 ft. and 2,500 ft., both f in. diameter, on original drums. Price £32 per ton on railway van, London. H. NEWTON KNIGHTS & OO., 19, St. Dunstan’s-hill, E.C. Wanted.—25-k.v.a. Static Transformer, 50 periods, 500/110 volts, single or three-phase.—Box 6687, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. STEAM NAVVIES. W-ton Wilson Crane Type Steam Navvy, good condition; £950. 10 h.p. Ruston Proctor Steam Navvy, late type, fine machine; £750. 10-ton Whittaker Crane Type Steam Navvy, good condition; £850. JOHN FREDK. WAKE, DARLINGTON. I Geo. N. Dixon & Co.\ 1 43, Castle Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plank Auctioneers & Valuers to the Engineering Trades. KNIGHT & PARTNERS Ltd 27, Old Queen* Street, Westminster, S.W. CORRESPONDENCE INVITED. SALES conducted in all parts of the Kingdom. _______________________________________________ COAL, IRON & STEEL SHARES, WILLIAM CHAPMAN & COMPANY Stockbrokers. (established since 1851). Cavendish Buildings, Wheeler Cate, NOTTINGHAM. Special Business in Coal, Iron and Steel Shares. Lists, reports, &c., will be forwarded regularly on application. __________________________________________________________ ELECTRIC LOCOMOTIVE AND OVERHEAD CRANES. 5-Ton Electric Loco. Crane, by Grafton. 34 ft. steel jib, 40-h.p. motor, 525 volts d.c.; £700. 3 ton Electric Loco. Crane, by Smith, 23 ft. steel jib; £525. 2-ton Electric Loco. Crane, by Isles, steel jib; £325. 15 ton Overhead Electric Crane, 4 motors, 39 ft. span; £525. 10 ton Overhead Electric Crane, 3 motors: £425. 5-ton Overhead Electric Crane, 1 motor, 40 ft. span ; £300. JOHN FREDK. WAKE, DARLINGTON. For Sale.—50 to 100 tons Larch Pit PROPS, 5 to 8 inches at butt, on rail Crewkerne station.—What oners, stating sizes required and prices. R. M. P. PARSONS, Estate Agent, Misterton, Somerset. Wanted.—Air-receiver, about 8 ft. by 3 ft., suitable for a working press, of 100 lb. per square inch, with manhole door on end. J- HEIRS, Horwoods Central Hotel, Coleford, Glos. For Sale,—Compressor, 1,000 to 1,500 cubic feet, 20 in. cylinder by 4 ft. stroke, worked by cross-compound condensing engine, cylinders 15 and 27J by 4 ft. stroke; makers, Holman Immediate delivery. A. UNDERWOOD, 3, Queen-street, E.C. _______ STEAM CRANES. /3A-ton Steam Stationary Crane, steel \Jr jib 70 ft. long; very fine condition. 10-ton Steam Travelling Derrick Crane, by Morgan, steel jib and mast 5-ton Steam Derrick Crane, bv Butters ; £210. JOHN FREDK. WAKE, DARLINGTON. For Sale.—Compressor. 750 cubic ft. straight line, 18 in. steam cylinder, 18 in. air, 30 in. stroke: bv Holman. Immediate delivery. J A. UNDERWOOD, 3, Queen-street, E.C. ELECTRIC PLANT. Two Very Fine Turbo - alternators, 700-kw. each; particulars on application. 250-kw. Generator, by G.E.C., 500 volts, d.c., 120 r.p.m.; low price. ^Two 50/75 kw. Generators,’coupled, by Armstrong Whitworth and Co compound-wound, 230 volts d.c.; £350. High-speed Generating Set, on one bedplate, Westinghouse engine direct coupled to Westinghouse dynamo, 30-kw. six pole, 125 volts. 300 r.D m • price £135. ’ 80 h.p. Four-pole Generator, 350 volts d.c.; £150. Two 50-kw. Generating Sets, high-speed Alley & McLellan engines, couple to Phoenix dynamos, four pole, shunt wound, 220 volts d.c. haaWO 12’hP- Phoenix Motors, four pole, shunt wound, 220 volts de 900 r.p.m., complete with starters and slide rails; £4710s. each JOHN FREDK. WAKE, DARLINGTON. ________ For Sale.—Boiler, 28 by 7, Lancashire, I5~lb- steam ; also self-contained COMPOUND ENGINE. 13 by 23 by 24; by Davy Paxman. Immediate delivery. A. UNDERWOOD, 3, Queen-street, E.C. __ __ MAXAih For BELTS, ROPES, & WIRE ROPES. $ MAXA LTD., 43, Cannon St., London, E.C. J J. W. BAIRD AND COMPANY, PITWOOD IMPORTERS, WEST HARTLEPOOL, YEARLY CONTRACTS ENTERED INTO WITH COLLIERIES. OSBECK & COMPANY LIMITED, PIT-TIMBER MERCHANTS, NEWOASTLE-ON-TYNE. SUPPLY ALL KINDS OF COLLIERY TIMBER Telegrams—“ Osbecks, Newcastle-on-Tyne.” _________________________________________ *±* For other Miscellaneous Advertisements see Last White Page. __________________________________________________________ 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. (Ai present on Active Service). LONDON, FRIDAY, MARCH 2, 1917. The London coal trade continues brisk. House coal and steam coal are exceedingly scarce, and many householders are fetching coal from the London depots. Only business of a small sort is passing in the Tyne and Wear market, and some lower quotations indicate the uncertain positiop. Reports from Lanca-