May 11, 1917. THE COLLIERY GUARDIAN. 927 SAVES ONE WAGON OF COAL IN EVERY FIVE. Reduces the Coal Consumption 15 to 20 per cent. Every Ton of Coal saved by the Econo- miser at a Colliery is another Ton for Sale at Market Price. Write for Pamph let “BQ” to E. GREEN & SON LTD., WAKEFIELD, England. The Use of Wood-Brake Blocks on Colliery winding engines is a source of danger from fire. Many instances have come under our notice where serious damage has resulted owing to the brake blocks firing. In addition there is the dan- ger of the brakes failing to act owing to the wood carbonising. These dangers can be eliminated by the use of Ferodo linings on your brakes. These are absolutely spark-proof and non-inflammable. Clutch and Brake Linings. Contractors to the War Office and Admiralty, London General Omnibus Company, and Underground Electric Railways of London and Paris. List H from THE HERBERT FROOD CO. LTD., Works-CHAPEL-EN-LE-FRITH. We hold stocks at London, Birmingham, Belfast, Bristol, Car- diff, Edinburgh, Glasgow, Liverpool, Manchester & Newcastle. Agents for India : THE ASBESTOS & BELTING CO., H3 3 & 4, Waterloo Street. CALCUTTA._ Brand Telephone Tel* A*,t,ress■ Bell: 829. “Vinco, Glasgow.” “Vine o’ Miners’ & Sinkers’ OILSKIN CLOTHING A Special Feature. At Keenest Prices. Everything in Oilskins for Town & Country Wear. BARR A Co. Ld. 83, Hutcheson St., GLASGOW. Contractors to the Admiralty & IM u.m.eK«ou.8 Corporations. Shipchandlers, Millfurnishers, Leadenhall Street, Son ” Telephone—Ave MACHINE CUT GEARING. Double Helical Staggered or Chevron. Reducing Gears. Haulage Gears. Time Recorders & Recording. Instruments. Watchmen’s Watches. THE LEWELLYN MACHINE CO.. Bristol. OVER 1,qoo PAIRS SOLD. NEW PRTENT N920901,igi3. | PER PAIR. EVANS Er DODD, !*“* CANNOCK. I “THE SOUTH WALES COAL-FIELD.”—PART III. 'By HENRY K. JORDAN, F.G.S. (Past President and First Gold Medallist of the South Wales Institute of Engineers). mHIS Paper completes the author’s monograph on the South Wales Coal-Field, and is published by the South Wales Institute of Enginers. It comprises 89 pages of printed matter, with a number of Sections inter- leaved, and the following large drawings which are issued separately 1. A Horizontal Section across the Carmarthenshire Coal-Field, from Pontyberem to the Sea near Llanelly. The Section is five feet in length, mounted on linen, and geologically coloured. 2. A Map on the Six-inch Scale of the Anthracite Area of Llan- non, Mynydd-Sylen, and Pontyberem. It also illustrates the Outcrops of the Seams, Fnults, &c. Three Sheets of Vertical Sections of the Deep and Important New Collieries that have been Sunk throughout the Coal- Field during the Past Six Years. The "ections are drawn to a scale of 100 ft. to 1 in., and the sheets are 40x27 in., mounted on linen The first portion of the text deals with the anthracite area and with the Pennant seams to the north and west of Llanelly and Burry Port. The remaining portion discusses the new collieries in Glamorganshire and Monmouthshire, with much additional information which brings the subject up to date. A limited number of the above are for sale, price £2 2 s. (postage extra), and may be obtained from THE SECRETARY, The South Wales Institute of Engineers, Cardiff. “The South Wales Coal-Field,” Part I., by Mr. H. K. Jordan, price £2 2s., dealing with the eastern half of the Coal Field; and “The South Wales Coal-Field ” Part II., by Mr. H. K. Jordan, price £1 Is., dealing • with the western half of the Coal-Field, may be obtained from the Secretary. HEYWOOD & BRIDGE’S PATENT Friction Clutches and Haulage Installations For Collieries, Mines, Quarries, &c. Specially designed to meet working conditions. Over 20 years’ experience is at your service. Our Clutches may be applied to existing pulleys or wheels without removal from pit. Send for Descriptive Catalogue—Free. BRIDGE & CO. LTD., DAVID Haulage Works, CASTLETON, MANCHESTER THOMAS SUMMERSON & SONS LTD ALBERT WORKS, DARLINGTON^ Sidings Contracted for Complete. MANUFACTURERS of SWITCHES and CROSSINGS, Chairs, Spikes, Fish Plates, Iron FISH PLATES and BOLTS for various sections 1 (7“1 and Steel Castings. of Rail kept in Stock. SMALLMAN patent HAULAGE CLIPS. New Model: Nine Sizes. Patented 1902, 1906 and 1910. Automatic Detachment. The 1911 lever has large lateral stops and a wedge-shaped head. Drop-forged shells (two sizes), levers (four sizes), catches and couplings. Illustrated Catalogue. Clips can be had without catches. Patentee and Sole Manufacturer:— JAMES W. SMALLMAN, Nuneaton, England THOMPSON & CO., --------------- WIGAN, -------------- Iron Merchants, Metal and Mineral Agents. RAILS OF EVERY DESCRIPTION, WITH FITTINGS COMPLETE, FOR COLLIERIES, CONTRACTORS, &c. SOLE AGENTS LN THE DLSTRLCT FOR THE SALE OF Wigan Coal & Iron Co.’s Siemens Steel Billets, Blooms, Bars, Angles, Bails, &c. SPECIALITY: STEEL FOR WAGON COUPLINGS. K.H. BASIC PIG IRON. Also Spiegeleisen, Ferro-Manganese & Silico Spiegel. Nobel’s (Gelignite, Polarite, Dynobel Nos. 3 & 4, Monobel No. 1, Viking Powder Nos. 14 2; Explosives ( Go. Ltd. (. also Detonators, Electric Detonator Fuses, and all Blasting Appliances. Haggie Brothers Ld. Wire & Hemp Ropes. POOLEY’S PATENT WEIGHING MACHINES. Telegraphic Address—“SPIEGEL. WIGAN.” Telephone—30 WIGAN