October 2 19 L4. THE COLLIERY GUARDIAN. 749 --- 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 11,000 Ovens have been placed with us, of which number over 4,500 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. Less Labour Cost. Consumption of Water is considerably Reduced. Plant is Simpler to Operate, and requires less supervision Plants already at work and under construcion to deal with the Gases evolved from upwards of 25,000,000 tons of coal per annum. Full Particulars on Application to— The KOPPERS’ COKE OVEN and BYE-PRODUCT CO., Telephone Nos. 1935 & 1331 (two lines). 301, Glossop Road, SHEFFIELD. “ KOCHS,”SHEFFIELD.” The CAMBRIDGE Patent BITUMINOUS SUCTION GAS PRODUCER For all kinds of Bituminous Fuels, Coal, Wood, Lignite, Peat, etc., etc. 50,000 H.P. ALREADY IN USE. Absolute Freedom from Tar. Operation of Gas Making Open to View. Free Access to Air. ROTATING FIRE BARS FOR LOOSENING CLINKER WHEN NECESSARY. ■ CAM8RI0CE PATENT :E.TUMIN