May 30, 1913. THE COLLIERY GUARDIAN. 1151 --- THE ----- Koppers’ Coke Oven has been proved to be the most successful on the market, as is evidenced by the fact that in the comparatively short period of ten years orders for over 10,000 Ovens have been placed with us, of which number over 4,250 are repeat orders. These orders represent a capital cost of over _ £8,500,000. -- SIMILAR SUCCESS ATTENDS THE INTRODUCTION OF - KOPPERS’ NEW SYSTEM OF ________BYE-PRODUCT RECOVERY. In the New System the Scrubbing process is entirely dispensed with, and the Ammonia is recovered direct from the Gas in the form of Sulphate. ADVANTAGES OF NEW SYSTEM Effluent Liquor reduced by 50 per cent, and upwards. Great Saving in Steam Consumption; Greater Yield of Sulphate and Benzol. Consumption of Water is considerably Reduced. Less Labour Cost. Plant Is Simpler to Operate, and requires less Supervision. Plants already at work and under construction to. deal with the Gases evolved from upwards of 25,000,000 tons of coal per annum. Telephone Nos. 1935 & 1331 (two lines). Full Particular 9 on Application to— THE KOPPERS’ COKE OVEN AND BYE-PRODUCT CO., 301, Glossop Road, SHEFFIELD. • • KOCHS,P SHEFFIELD." 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 (been published by the South Wales Institute of Engineers. It consists of 81 pages of printed matter with Sections and Diagrams. The large drawings bare 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) 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 la., Postage Extra. 0 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 Secretarv. SMALLMAN HAULAGE CLIPS. New Model: Nine Sizes. Patented 1902, 1906 and 1910. 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. INDISPENSABLE TO STUDENTS. Bound in Cloth, ios. 6d.; Paper Covers, 8s. 6d. Supplementary Volume Tine to Mechanical Engineering of Collieries. This Important Work consists of:— \Vol. I.—Bound in Cloth. Price 21s. net. Part I.—Boring, Sinking, Surface Arrangements, Headgears, Shafts. 128 pp. Crown 4to (9J in. by 7J in.). Illustrated by 294 Diagrams and Illustrations. Part II.—Winding. 169 pp. Crown 4to (9f in. by 7£ in.). Illustrated by 337 Diagrams and Illustrations. Part III.—Heapsteads, Screening and Washing. 177 pp. Crown 4to (9f in. by 7| in.). Illustrated by 427 Diagrams and Illustrations. Separate parts in Paper Covers. Price 5s. 8d. each net. Vol. TI.—Haulage, Pumping, Power and Coke Ovens, and a Complete Index to Vols. I. and II. 294 pp. Crown 4to (9f in. by 7£ in.). Illustrated by 585 Diagrams and Illustrations. * Paper Covers, Price 8s. 6d. ; Bound in Cloth, 10s. 6d. net. SUPPLEMENTARY VOL.—Ventilating Fans, Coal-Cutting and Conveying Machinery, Ambulance and Rescue Appliances.238 pp. Crown 4to (9f in. by 7| in.). Illustrated by 294 Diagrams and Illustrations. Publishers: THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C.