1254 ____________________________________________________________________________________________________________ THE COLLIERY GUARDIAN June 21, 1918. CONTENTS. Editorial Articles :— Page Conciliation and Arbitration ................ 1255 The Magnetic Meridian...................... 1255 Articles :— The Origin of Blackdamp............................ 1245 The Wages of Underground Day wagemen ..... 1246 Coal Exports in May........................ 1247 Coal Controller and Absenteeeism............. 1247 Miners’ Proposed Six Hours Day ............. 1247 Explosives in Coal Mines_____'............... 1248 Estimating Injurious Dust in Mine Air by the Kotze Konimeter _____’..................... 1248 The American Coal Trade .................. 1249 Mining Industry and Military Service......... 1253 Power and Consumption of Gas Engines ....... 1253 South Wales Mining Timber Trade ........... 1259 Mean Magnetic Declination.................. 1260 Labour and Wages ......................... 1260 Open Contracts ........................... 1262 Obituary ................................. 1262 The Freight Market ........................ 1264 Publications Received ....................... 1264 Government Publications.................... 1264 Abstracts of Patent Specifications Recently Acptd. 1264 New Patents Connected with the Coal and Iron Trades ................................. 1264 Reports of Meetings:— Mining Institute of Scotland ................ 1247 Institution of Mining Engineers ............. 1249 The Coal and Iron Trades ...............1256 —1259 The London Coal Trade .................... 1259 The Tin-plate Trade........................ 1259 The By-Products Trade .................... 1259 Parliamentary Intelligence __................ 1253 Notes from the Coal Fields.................. 1259 Coal, Iron and Engineering Companies.......__ 1262 Miscellanea:— London Coal Exchange...................... 1247 Coal Mining Industry in Holland—Control of Coal Mining............................ .. 1248 Tar Fuel for Diesel Engines—Steam Production with Pulverised Coal...................... 1256 Use of Peat-Coal Fields of the Ukraine....... 1258 Manchester Coal Supply — Exports of Coal Products—Imports of Pit Props............. 1260 Willing's Press Guide for 1918—Temperature Conversion Table—Imports and Exports of Mining Machinery—Dutch Need of Coal..... 1262 Canada’s Coal Shortage .................... 1264 U/ VV IAi ri )T T7Q pOR MINERALS, -DvJJlvJ jI IAJJj LjO water and brine, Boreholes for Prospecting in Underground Workings a Speciality. VIVIAN’S BORING COMPANY, PARKSIDE, CLEATOR MOOR. OVER 88 MILES OF BORINGS COMPLETED. Established 44 years. Largest experience. Telegrams—“ Vivians, Parkside, Cleator Moor.” ________________________________________________ BORING for MINERALS, &c. Solid Specimens of the Strata obtained. Established 1888. Work guaranteed. _____ J. S. DAVIDSON & SON, St. Bees, CUMBERLAND. ____________________________________ “CROWN BOILER COVERINGS of Outstanding Superiority. 96°/o SAYING Intensest Heat cannot Impair. Union Works, Codley, ©uJB&jMrirfc oHOSti nr. Manchester. ____________________________ ARMYTAGE & JONES Ltd., SHEAF STREET, SHEFFIELD. _______ RAILS. WAGONS. CRANES. (For all purposes). (Coal & Ballast). (Loco & Derrick). Boiler Tanks. Points and Crossings. Sleepers. Buffer Stops. Buyers of all kinds Steel and Iron Scrap. _______________________________________ See Illustrated Advt. PEEBLES BRUCE PEEBLES & Co. Ltd. Engirfeers. EDINBURGH. Electrical Machinery Geo, N, Dixon & Co,, 43, Catlin Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant, Colliery Engineer Required by the Government of Nigeria for two tours of twelve months, with possible extension. Salary £350—£10—£400, and a war bonus of £60 per annum whilst in West Africa if the person engaged has dependants. Single quarters and second-class passages. Liberal leave in England on full salary. Candidates must be young and energetic, with experience in general colliery engineering practice (modern haulage, ventilation and screening), capable of handling the engineering work in the development of new collieries, and with experience in electrical engineering as applied to collieries. Apply at once by letter, giving full particulars as to age, qualifications, and experience, to— Sir J. CADMAN, Mining Department, University, Birmingham. /A ob Fires.—Gentleman, with 20 years’ V_zT experience with underground fires, SEEKS APPOINTMENT* to look after same.—Apply, Box 7088, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Wanted, Under-Manager for Steam Coal Colliery, South Wales.—Apply, stating age, experience, and wage required, to Box 7085, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Wanted, Draughtsman, for Colliery Plant. No person already engaged on Government work need apply—Apply nearest EMPLOYMENT EXCHANGE, quoting number A 5521. _____________________________________________ Wire Ropes.—Works Manager Required. —Apply by letter, stating age, previous experience, and enclosing references, to W. B. BROWN & CO. (BANKHALL), LTD., Globe Works, Bankhall, Liverpool. Wanted, for duration of war, competent COLLIERY SURVEYOR. Musi be over military age, or ineligible for Army.—Apply, stating age, wages required, together with copies of three recent references, to THE BLACK PARK COLLIERY CO. LTD., Chirk, Denbighshire. DERBYSHIRE. _______ Parish of ASHOVER, near Matlock and Chesterfield. ____________________________________________ outlets for ADVERTISEMENTS med PDBLIGATIOW- $0 a Street, Holborn, London, 4. 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) : For 52 insertions 3s. 9d. ) per insertion for each 13 „ 5s. 3d. 5 meh m depth. Double Column (6 inches wide), double the above rates. Three Columns (9 inches wide), three times the above rates. ______________________________ ASEft niBEO JOHN BAKER & SON. ■A n HB ■ 1 J* I* IRON A1,D STEEL WORKER'- rtKBB I BH taW Thompson St., BILSTON TUB CORNER PLATES BUCKETS and BASKETS ___________________________ “TOLEDO” (APPROVED BY WOOLWICH ARSENAL). An Absolute Rust Preventer. TO BE SOLD BY PRIVATE TENDER: THE HIGHEST OR ANY TENDER NOT NECESSARILY ACCEPTED. A Valuable Freehold Property, known as THE OVERTON HALL ESTATE, embracing an area of about 1,060 acres, and comprising an attractive Stone-built Residence known as OVERTON HALL, which occupies a charming situation, and contains Nineteen Bed and Dressing Rooms, Two Bath Rooms, Corridor Entrance Hall, a Suite of Five Reception Rooms and Billiard Room, and well-arranged Domestic Offices. Capital Stabling, large Garage, Laundry and Outhouses, beautiful Gardens and Grounds. The Property contains Valuable Veins of Lead Ore, Fluor Spar, Entrochal Marble, Ochre, Limestone and Gritstone Quarries, and other Minerals. The Agricultural Portion comprises Fifteen Farms, Dwelling Houses, Accommodation Land, Woodland and Building Land. Particulars may be obtained from Messrs. EDENS, Land Agents, Higham, Alfreton, Derbyshire, to whom Sealed Tenders should be sent not later than July 15th, 1918. FOR SALE. Sawmill, with water frontage, and adja- cent to railway station, complete, with first-class machinery, as a going concern . Apply to— T. S. INNES, Prudential-buildings, N e wcastle-on-Ty ne. Pit Props for Sale.—About 5 truck loads of MIXED WOODS, 2 ft. 6 in. to 8 ft. Apply— W. VINCENT, Castle-street, Reading. _________________________________________________ Established 1866. PATENTS, DESIGNS, and TRADE MARKS. TT ARRIS AND MILLS, Chartered Patent Agents, 34 and 35, HIGH HOLBORN, LONDON, W.C. 1. Telegraphic Address—“ Privilege, London.” Tel. No.—Holborn 2 63. T3ATENTS. Advice Free. _JL 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. 1. ________________ WAGON AMD COLLIERY PAINT & INSULATING VARNISHES, ______________________________________ W. W. Hill, Son & Wallace Ltd., Elton St., Broughton Bridge, MANCHESTER. ____ ____ ---- ESTABLISHED 1840. - T7or Sale, one strong heavy Cast Iron 1 TANK, constructed with thick flanged plates, bolted, and cross rods inside, all rounding corners, and about 18 ft. by 18 ft. by 9 ft. deep.—Price and particulars, letters, Box 7087, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Wanted, Second-hand Steel or Pitch PINE PIT HEAD GEAR, in first-class condition, from 50 to 60 feet high, with two winding pulleys, etc., complete. State full par- ticulars, lowest price, when and where same can be seen, to Box 7086, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Safety First: The HOLDARITE is the ONLY Safety Belt (single strap) that ARRESTS and HOLDS men RIGHTLY. Weight lb. Strength 3,000 lb. Is specially for men sitting at work. Price £10 per dozen, on approval. '3 From, A. HANLEY, Thirlmere, Sheffield. D. Llewellin Svans PROPRIETOR OF THE Cardiff Brattice Cloth Company, BUTE ST., CARDIFF. AGENT FOR Kobers Esrplodves, __________________________________________ VENTILATING FANS AND ENGINES. See Advertisement appearing on front Cover of alternate weeks. THE WADDLE PATENT FAN (AND ENGINEERING CO. LTD., eLlanmore Works, Llanelly. ______________________________________________ WRJGG 6 BIGGIN L" Constructional Engineers, 50, Effingham Road, Sheffield, MANUFACTURERS OF English Steel Joists, Rlvetted Girders, Flitch Plates, Angles, Tees, Channels, Constructional IF a n 'nr -.-iu iLLiimnnrui. u j-.r—.r>-r.ri ■WTjLtiMautiLwiM^—suaiuuxxs Steelwork, &c., SOLICIT YOUR ENQUIRIES. __________________ We hold a LARGE STOCK of all Sections for prompt delivery. Telegrams— Telephone— “ Girders, Sheffield.” 3873 Central. ________________________________________________________ Wanted, Colliery Electrician, to take charge of shift; well up in A.C. and D.C. work, Signals and Telephones. State age, wages required, experience, and particulars of exemption from military service (if any).—Box 7077, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Wanted, by large firm of Constructional Engineers, DRAUGHTSMAN, fully experienced in the design of modern coal washing plant, to take entire charge of department.—Box 7035, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Brattice Cloth. — Gentleman Wanted with influence amongst colliery managers and proprietors, to sell BRATTICE CLOTH on good commission only.—Address, FAIRCLOUGH & SON'S, Bank-lane, Clayton, near Manchester. Wanted, an Assistant Manager at a large Colliery. Good salary to suitable man.—Apply, Box 7089, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. K/AUj-kw. Steam Generating Set, com- t/V/V/ prising a Beiliss triple expansion engine, coupled to an alternator by The Electric Construction Co., Wolverhampton, 3,000 volts, 50 periods, with Wheeler-Worthington independent surface condensing plant. Modern plant, in first-class condition, and for immediate delivery. HARRY H. GARDAM & CO. LIMITED, Staines. Two 250-kw. Beiliss Alternator Sets, each comprising a compound enclosed engine with E.C.C. alternator, 3,000 volts, 50 periods; quite modern, and for immediate delivery. HARRY H. GARDAM & CO. LIMITED, Staines. FOR SALE. hgine, 250-b.h.p., compound, self-con- I tained, by Robey ; trip gear rope flywheel; immediate delivery. A. UNDERWOOD, 3, Queen-street, E.C. 4. A ir Compressors Wanted.-—One 150 cubic feet per minute to 150 lb.; one 150 cubic feet per minute to 100 lb.; both steam-driven. PIPES WANTED—250 ft. 4| in. bore, and 350 ft. 3J in. bore. Perfect articles only considered. THOMAS MATTHEWS LTD., Well-Borers, Pendleton, Manchester. FOR SALE. 1. ONE HORIZONTAL HAULING ENGINE, having two cylinders 22 in. dia., 3 ft. 6 in. stroke; Stephenson link motion reversing gear and slide valves, complete with heavy flywheel, pinion and spurwheel (in halves), but without second motion shaft. 2. ONE SINGLE CYLINDER INGERSOLL-RAND COMPRESSOR, steam cylinder 18 in. dia., air cylinder 18J in. dia., 2 ft. stroke; compressor suitable for a speed of 60 revs, per minute and to compress to 60 lb. per sq. inch gauge pressure. 3. ONE HORIZONTAL ENGINE, having two cylinders 16 in. dia. by 2 ft. 8 in. stroke, slide valves, shaft mounted with flywheel and rope-driving pulley 9 ft. dia., suitable for seven 1| in. dia. cotton ropes; a driven pulley 4 ft. dia. can also be supplied if required. 4. ONE ROPE-DRIVEN AIR COMPRESSOR, having two cylinders 22 in. dia. by 3 ft. stroke; cylinders fitted two years ago by Messrs. Walker Brothers Ltd., Wigan; water jacketted, valves of latest steel plate type, shaft mounted with very heavy flywheel, and rope pulley 13 ft. dia. for twelve 1£ in. dia. cotton-driving ropes; a countershaft with pedestals and rope and belt pulleys suitable for belt-drive from a motor can also be supplied. Com- pressor suitable for a speed of 60 revs, per minute and to compress to 100 lb. per sq. inch gauge pressure. For prints and authority to inspect, apply— THE BOTHER VALE COLLIERIES LIMITED, Treeton, near Rotherham. ________________________________________________________ Wanted, Head Gear Winding Pulley, 6 feet diameter.—Apply, Box 7084, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Tj^or Sale, 20 pairs of Railway Wheels 1 ’ and AXLES, 4 ft. 8£ in. gauge, wheels 3 ft. diameter, axles 4 in. diameter. T. C. JONES & CO. LTD., 27, Sterne-street, Shepherd’s Bush, W. 12.