June 26, 1914. THE COLLIERY GUARDIAN. 1509 --- 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 - HOPPERS’ 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 FJEW 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 Particulars on Application to— THE KOPPERS’ COKE OVEN AND BYE-PRODUCT CO., Telephone Nos. 1935 <& 1331 (two lines). 301, Grlwssop 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 FtftE BARS FOR LOOSENING CLINKER. WHEN NECESSARY t* , rxwHRlDM P’-TtNT *- ■m - >.rwMDrflVs.'-$uHYH ■; 7 ' • '• 'fi- ■■■ 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