1176 THE COLLIERY GUARDIAN. May 29, 1914. ® EFFICIENCY & WEAR W 2 MOST IMPORTANT POINTS • to have in mind when purchasing Machine-cut Gearing. THE DBS GENUINE DOUBLE HELICAL GEARS Offer all this and more. Made from specially selected material, with teeth accurately cut in one continuous piece direct from the solid—they are an ideal drive for heavy power transmission. SILENT RUNNING. David Brown & Sons Ltd., Huddersfield. EDWIN LEWIS & SONS, WOLVERHAMPTON. Telegrams—“ Lewis, Wolverhampton.” Telephone—No. 15 Wolverhampton. "WORKS— Patent Iron Tube Works, Monmore Green. Britannia Tube Works, Ettingshall. London Office—143, CANNON STREET, E.C. Liverpool Warehouse 58, South John Street. Joint "Acme" FOUNDED 1895. THE QUARRY, The Organ of the Stone, Marble, Slate, Lime, Clay and Cement Trades, Circulating amongst QUARRY OWNERS and MANAGERS, ARCHITECTS, ENGINEERS, SURVEYORS, STONE MERCHANTS, &c. Price— 6d. monthly. Annual Subscription, 7 s. 6d. post free (payable in advance). Offices— 30 & 31, Furnival Street, Holborn, London, E.C. TUBES OF ANY SIZE For Compressed Air, Water or Steam, or any description of COLLIERY WORK. Original Inventors of Loose Flanged Tubes. BRIQ.UETTE SANDYCROFT w ties MACHINERY. NEW PATENTED IMPROVEMENTS Robt. &C“ Sheepscar Foundry, Leeds, England. SOLE PATENTEES & MAKERS. Telegraphic Address—“Hydraulic, Leeds,” Telephone—No. 214 Leeds. “ABC” 5th Edition, and Lieber’s Telegraphic Codes used. SMALLMAN 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. LIMITED. CHESTER. sS"-. I.> * ALFRED ALLEN & SON MaRerH of DTD. ■COLLIERY AIR PIPES MT and COLLIERY TUBS In IRON, STEEL and WOOD. Lower Gornal, nr. Dudley. Telegramg—** Allen, Lower Gornal.” Telephone—106 Dudley. THE SOUTH WALES COALFIELD. PART II. By Henry K. Jordan, F.G.8. (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 jeen published by the South Wales Institute of Engineers. It consists of fl pages of printed matter with Sections and Diagrams. The large drawings ire 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 folio wing areas — (A) Neath Valley. (E) Ammanford. (B) Swansea Valley. (F) Loughor 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 £1 Is., 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, and may be obtained from the Secretary.