948 THE COLLIERY GUARDIAN. May 18, 1917. CONTENTS. Editorial Articles :— page The British Trade Corporation............ 949 Works Organisation ......;................. 950 Articles:— Micro-Petrology of Coal .................. 941 The Fused Silica Industry ................ 943 The Ropeway Installations of the Blaenavon Com- . pany, South Wales........................ 943 Coal at Oxley Creek, Queensland............. 944 Mining Employment Statistics............... 945 Wet v. Dry Coal Storage..................... 945 French Maximum Prices for Imported Coals...... 945 Subsidence Resulting from Mining............ 946 The American Coal Trade ................... 947 Mining Industry and Military Service ...... 947 ' South Wales Mining Timber Trade ........... 954 Russian Investigations on Mine Gases ..... 955 Coal Mining in Alberta during 1916.......... 956 Labour and Wages....................... 957 Obituary......... ■;.................... 958 • Open Contracts ............................ 959 The Freight Market........................ 959 Publications Received....................... 959 Abstracts of Patent Specifications Recently Accepted.............................. 960 New Patents Connected with the Coal and Iron Trades................................... 962 Letters to the Editors :— Export Standardisation Rules ............... 956 Reports of Meetings :— Manchester Geological and Mining Society.... 956 The Coal and Iron Trades....................951—954 The By-Products Trade .................... 953 The Tin-plate Trade....................... 953 The London Coal Trade ................... 954 Current Science and Technology................. 946 Law Intelligence ............................ 950 Parliamentary Intelligence .................... 954 Indian and Colonial Notes ................... 954 Notes fr6m the Coal Fields .................... 958 Coal, Iron and Engineering Companies ......... 959 Miscellanea:— x French Forestry Committee—State Control of Mines—Miners and Food Rationing ..........., 950 Spain’s Coal Imports—Russian Coal Monopoly f Probable—Triple Industrial Alliance ...... 953 Imports of Pit Props...................... 954 Yorkshire Miners and the War—Trade Opening in Italy................................... 958 Exports of Coal Products—Coal Exports—Exports and Imports of Mining Machinery ......... 959 Eighty-five Ton Coal Wagons..............-.. 962 Offices for ADVERTISEMENTS and PUBLICATION- 30 & 31, Furnival Street, taolborn, London, E.C. 4. Telegraphic Address—“Colliery Guardian, Fleet, London.*’ Telephone—1354 Holborn Established 1866. PATENTS, DESIGNS, and TRADE MARKS. TT ARRIS AND MILLS, JL_L Chartered Patent Agents, * 34 and 35, /HIGH HOLBORN, LONDON, W.C. Telegraphic Address—" Privilege, London.” Tel. No.—Holborn 2763. PATENT FOR SALE. "Dumpstead’s Steel Adjustable Pit Props. M T Full particulars of the above may be had on application to— Mr. W. BUMPSTBAD, 16, Kings terrace, Treeton, nr. Rotherham. JOHN STANIAR & CO., Manchester, Eng. Wire Weavers & Metal Workers. / Established over 100 Years. ' ------— EVERY REQUISITE. —------------------ GAUZES in Silk and Wire. BRUSHES in Bristle, Weed, Fibre or Steel, for every known make of Brush Machine. , PERFORA TED PL A TES in Iron, Steel, Zinc, Brass, Copper. GUARDS for Engines, Stores, Machines, Strapping, Lifts, &c. AWARD MEDALS—Japan-British 1910, Franco-British 1908. Telegraph—” Gauze, Manchester.” Telephone—City 3306 Stop Taking Risks! Highest Efficiency, Longest Service obtained by using only “CHEKKO” BRAKE & CLUTCH LINERS. CRESSWELLS’ LD., Wellington Works, Bradford. New and Converted 8 and 10 Ton Railway Wagons for Sale. Apply, Box 6722, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. _______________________________:___:_______ ASSOCIATION OF PRIVATE OWNERS OF RAILWAY ROLLING STOCK. Formed in 1891 for the Protection of the Rights and Interests of Private Owners. Applications for particulars and terms of membership may be sent to the SECRETARY. Clarence Chambers, Gloucester. The Oldest Diamond Drill Company. Established 1872. BORING for J^INERALS. SPEED AND CERTAINTY. CYLINDRICAL “ CORES.” THE AQUEOUS WORKS AND DIAMOND ROCK-BORINQ Co^ LTD. Guildford Stm 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, POBTH, GLAM. -PT'lTtCTpctZ * .WILLIAM THOMAS, M.Inst.M.E., F.G.S., M.R., Society of Arts. Tutors—Staff of Highly Qualified Instructors in all subjects. An University Training at Your Own Home. Instruction and Lessons by Post for Mine Managers, Surveyors, Electricians, and Mine Inspectors. Since the coming into force of the New Mines Act 618 Students of this School have been qualified as First and Second-class Mine Managers. 99 students have passed the Home Office Surveyors’ Exam.; 30 students are now Mines Inspectors. 40 passed First-class Electrical Engineers. Candidates for the above write without; delay for free Syllabus, and book of Previous Examination Questions. (Dept. G.) CAMBRIAN MINING SCHOOL, FORTH, Glam. Briquette Machinery Ltd., CharmouthStreet, LEEDS. Machinery for Briquetting Peat, Lignite, Coke, Coal, Iron, Copper,. Nickel, Cement; Also Sawdust, Waste Cereals, Offals, Sewage. PATENT COAL DRIER. The U.M.S. LESSONS BY POST. The best Mining Education. Unapproachable Successes. 52 H.M. Inspectors are U.M.S. Men. Syllabus free. — THE UNIVERSAL MINING SCHOOL «•) 50, Connaught Road, Cardiff. C.M.A. CORRESPONDENCE SCHOOL (Founded by T. A O’DONAHUE, F.G.S., F.S.I.). Complete Courses of Postal Tuition suitable for Home Office Mining Exams. Free Syllabus from Secretary, C.M.A. SCHOOL, Leigh, Lancs. 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. RAILS. v 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. STEEL Rails Roof Rars Pit Props Arches For COLLIERIES V V and WORKS. THU? W. WARD Ltd., Albion Works, SHEFFIELD. TRY US. — BITUMINOL BLACK ELASTIC. ACID-RESISTING. QUICK. 1 cwt. covers 7,000 sq. ft. 30/- cwt. carriage paid. Also “BITSOL’’ QUICK TAR BLACKS 20/- and 15/- cwt. TOLEDO JJ An Absolute Rust Preventer (APPROVED BY WOOLWICH ARSENAL). WAGON AND COLLIERY PAINT & INSULATING VARNISHES. W. W. Hill, Son & Wallace Ltd., Elton St., Broughton Bridge, MANCHESTER. ---- ESTABLISHED 1840. - Geo. N. Dixon & Co., 43, Castle Street, Liverpool, Auctioneers and Valuers, COLLIERIES, Brickworks & Mining Plant. Auctioneers & Valuers to the Engineering Trades. KNIGHT & PARTNERS Ltd. 27, Old Queen Street, Westminster, S.W. k ‘ CORRESPONDENCE INVITED. SALES conducted in all parts of the Kingdom. Telephone 1005. COAL. Prices on application delivered any Station, ANTHRAGSTE GOAL for Malting, Hop Drying, Household, Lime Burning, Horticultural purposes, and Gas Producing Plants. Apply, J. S. TAYLOR, 44, Corporation St, Preston, Lancs. MACHINE CUT GEARING. . Double Helical Staggered or Chevron. Reducing Gears. Haulage Gears. Time Recorders &..Recording instruments. Watchmen’s Watches. THE LEWELLYN MACHINE CO., Bristol. D. Llewellin Evans, PROPRIETOR OF THE Cardiff Brattice Cloth Company, CARDIFF AGENT FOR 120, BUTE ST. ■ NoWs Rzplosives, For all kinds of Machines. Let us quote you for \ ENGINEERS’ HAMMERS & CHISELS, Small Forgings, Castings in — Lead, Copper & Brass. — The Patent Stone-dressing Tool Co. Id. Wicker Lane, SHEFFIELD. WIRES AND CABLES. THE WHOLESALE ELECTRICAL CO. LTD., 54/56, Oxford Street, London, W. 1. ’Phone: Museum 1897. YATanted.—Colliery Manager’s Assistant V V and SURVEYOR for large colliery. — Apply, stating age, experience, salary required, and when at liberty, to Box 6732, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4. Mine Accountant, 22 years’ experience abroad, wants responsible POSITION at home; over military age, good references.—Box 6734, Colliery Guardian Office, 30 & 31, Furnival- street, Holborn. London, E.C. 4. entleman, with knowledge of Explosive trade and companies work, wanted by London controlled firm for administrative duties. Must be ineligible for military service. Write fully to Box G 3256, c/o DAWSON’S Advert. Agency, 121, Cannon-street E.C. 4. Brattice Cloth. — Gentleman Wanted with influence amongst colliery managers and proprietors, to sell BRATTICE CLOTH on good commission only.—Address, FAIBCIiOUGH & SONS, Bank-lane, Clayton, near Manchester. Wanted. — First - class Certificated COLLIERY MANAGER, for large developing Midland colliery, chiefly for underground work and to act under agent; experience of incline seams, coal-cutting and extensive haulage required; must be 6 o’clock man, and thoroughly practical.—State experience, age, reference and salary to Box 6742, Colliery Guardian Office, 30 &31, Furnival-street, Holborn, London, E.C.4. /Colliery Manager, with many ’years’ successful experience, is anxious to make a change. Present output 1,400 tons per day. Would accept position as MANAGER or AGENT, or both combined. Can give excellent references. Full particulars. All communications to be treated with strict confidence on both sides—Apply, Box 6735, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London* E.C. 4. ; 1 For Sale.—Well-equipped Brick Works, with forty acres freehold. Red Marl Clay—for . superior facing. Valuable Building Land on main road near large Government works.— Apply, J. JACKSON SAINT & CO., Chartered Accountants, 22, Lowther- street, Carlisle. SALES-TIMBER. Larch and Fir Props.—For Sale, 6 in. dia. tops, cut to specified lengths. Offers per 100 yds. delivered.— Box 6743, Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. 4.