900 THE COLLIERY GUARDIAN. May 2, 1913. GENUINE DOUBLE HELICAL GEAR With Teeth cut direct from the solid in one continuous piece Maximum STRENGTH and EFFICIENCY. Sole Manufacturers— DAVID BROWN & SONS (MFD.) LD., HUDDERSFIELD. THE AVONSIDE ENGINE CO. LTD. Best Materials. Finest Workmanship. IN STOCK, for Collieries, Steel Works, &ob THE “Bowie” Underground Lamp Re-Lighter Patented in Great Britain, Germany, France, Belgium, U.S. America, in 1907-8, and since used with success and without accident in the most dangerous Mines in these Countries. Adopted by the French Government for use in French Mines. Bias :<<,x '^4.' < PPxP*** 'fop* Air-tight, Non-Inflammable, Gas-proof, Insulated & Non-external Sparking. Electric Contacts are fixed and there are no switches or secondary cur- rent to contend with. No cells or accumulators to replace. The Lamp is totally enclosed in gas- proof chamber when being re-lighted, and can only be operated by authorised persons. It can be used with absolute safety for igniting Lamps in the most gaseous atmosphere. Adapted to Ignite any form of Safety Lamps. Impossible to generate an electric current from the apparatus until the Lamp-containing receptacle has been made perfectly air-tight. Always ready for use and its upkeep is practically nil. Further particulars may be obtained on application to— E. THOMAS & WILLIAMS L'° By Appoint ■ent to H JI. Tkt Ent, FIRE ENGINE MAKERS MERRYWEATHERS’ Large* Maker, of High-dam HOSE PIPES fa the World. Dab-Sob Canvas f________\ Admiralty Leather for Flushing.' irnwnred Rubber for Mines. Write ter "Hints ea Hom,** and qaotatioM. MERRYWEATHER & 80N8, Fin Engine nd Hote Wtrki, GREENWICH, LONDON, S.E. for Fire Duty* HAGGIE BROS. Ltd. Gateshead-on - Tyne. Established 1800 MANUFACTURERS OF IMPROVED PATENT Flat and Round Wire and Hemp ROPES OF ANY LENGTH FOR COLLIERIES AND RAILWAYS, FROM EITHER BEST SELECTED CHARCOAL IROH, IMPROVED PATENT OR PLOUGH STEEL WIRE. Flexible Galvanized Steel Hawsers (all guaranteed to Lloyd’s test), with Winches or Reels and Stoppers, Wire Signal Lines for Railways and Collieries Copper Lightning Conductors, complete. Galvanized Fencing Strand. Galvanized Wire Rope for Ships’ Rigging. Galvanized Wire Rope fitted up to order. Picture and Sash Cord made from Copper, Brass Plated or Galvanized Wire. Crane Ropes, made to suit small Drums and Pulleys. We have Crane Ropes working or the same Barrels as Chains. Wire Rope Springs; Wire Rope Pulleys. Wire Rope Composition or Grease. White Block Ropes and general Hemp Cordage. Chains of every description. Wire Ropes made specially to suit small Pulleys. We can guarantee uniformity of all our Ropes, as we draw our own Wire from Special Rods, got up to our own specification. Owing to our “ Special Quality,” have Haulage Hopes running 14 years and Winding Ropes years 'tigjeerrams—“Haggle. Gateshead” ALFRED ALLEN & SON or X**X*D. ^COLLIERY (■T and COLLIERY TUBS In IRON, STEEL and WOOD. Uowex* Gornal, nr. Dudley. Telegrams—“ Allen, Lower Gornal.” Telephone—106 Dudley. Write for Illus- trated Price List. Specialities: LATHES & SAW BBNCHB8. First class at competitive prices ROWLAND C. FOOT a Co. 11, Queen Victoria St., London, E.C. THE SOUTH WALES COALFIELD. PART II. By Henry K. Jordan, F.G.S. (Past President and first Gold Medallist of the South Wales Institute of Engineers). This Paper, which deals with the western part of the Coalfield, has just been published by the South Wales Institute of Engineers. It consists of 81 pages of printed matter with Sections and Diagrams. The large drawings are issued separately and comprise :— 1. A Horizontal Section across the anthracite region of Llandybie and Pant-y-ffynnon, and via the Dulais Valley to the sea at Swansea. It is drawn to a scale of six inches to one mile, is 8 ft. in length, mounted on linen, and geologically coloured. 2. Comparative Sections of the Lower Measures in the following areas — (A) Neath Valley. (E) Ammanford. (B) Swansea Valley. (F) Louohor Valley. (C) Brynamman District. (G) Gwendraeth District. (D) Amman Valley. (H) Gwendraeth District. These are drawn on one sheet, about 35 by 30 in., mounted on linen, to a scale of 200 ft. to 1 in. 3. A Map of Swansea District, on a scale of 6 in. to one mile, showing the outcrops of the coal seams. A limited number of the above are for sale, and may be obtained from The Secretary, The South Wales Institute of Engineers, CARDIFF. Price Al la., Postage Extra. ” The South Wales Coalfield,” Part I., by Mr. H. K. Jordan, published in 1908, price £2.2s., dealt with the eastern half of the Coalfield, ana may be obtained from the Secretary.