August 21, 1914. THE COLLIERY GUARDIAN. 447 --- 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-PRODOGT 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. AOVaNTAGES OF NEW SYSTEM Effluent Liquor reduced by 50 per cent, and upwards. Consumption of Water Is considerably Reduced. Great Saving in Steam Consumption. Less Labour Cost. Greater Yield of Sulphate and Benzol. Plant is Simpler to Operate, and requires loss 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. Full Particular* on Application to— THE KOPPERS’ COKE OVEN AND BYE-PRODUCT CO., Telephone Nos. 1935 & 1331 (two lines). 301, €!lossop tfloe&tiL ‘ ‘ KOCtiS? s’hEFPIELD.” ____ Bl'" .. .. . .... ■ ■ .... — * 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. We are exhibiting at the SHIPPING ENGINEERING & MACHINERY EXHIBITION, at Olympia, 25th September to 17th October. ROTATING FIRE BARS FOR LOOSENING CLINKER WHEN NECESSARY. ■ No Mechanical Tar Extractor Necessary. No Risk. No Hopper Slide Required to Hermetically Seal Producer. FULL GUARANTEES GIVEN. Can he adapted to any existing engine from 25 h.p, and upwards, MADE AND SOLD BY THE LICENSEES— WRITE FOR PARTICULARS. KYNOCH Ltd., Witton, BIRMINGHAM