October 29, 1915. ________THE COLLIERY GUARDIAN._911 --- THE --- Koppers’ Coke Oven Is undoubtedly the most successful Bye-Product Oven on the market. Since its introduction a little over 10 years ago there have been built 12,500 KOPPERS’ OVENS. KOPPERS’ OVENS ARE AT WORK HEATED BY PRODUCER GAS AND BLAST FURNACE GAS. KOPPERS' DIRECT RECOVERY PROCESS IS THE SIMPLEST AND MOST EFFICIENT SYSTEM OF AMMONIA RECOVERY. PLANTS ERECTED FOR THE RECOVERY OF BENZOL & TOLUOL, FOR TAR DISTILLATION & THE MANUFACTURE OF SULPHURIC ACID. ------ Full particulars on application to -~- The Koppers’ Coke Oven and Bye-Product Co., 301, GLOSSOP ROAD, SHEFFIELD. -SXSZ, M. COULSON & CO. LTD., SPENNYMOOR, Makers of Coal Washers, Screening Plant, . . Conveying, Elevating, and Crushing Machinery, Tipplers, Tub Controllers, . , Storage and Drainage Bunkers. . . Replace parts and Repairs given Special Attention. Estimates and Full Particulars on Application. ■ . ■ :.w| ., w;. ' T1? ; ' v’ LTD BRIDGEND, BREAKING SIZING AND WASHING PLANT We have Specialised in this class of Machinery, and have designed and made more than all other firms combined. References to users are invited. X Established 50 Years. ANTHRACITE COAL” , ■ ' • . ' • • •