April 5, 1918. THE COLLIERY GUARDIAN. 705 WET SHAFTS MADE WATERTIGHT BY OUR CEMENTATION PROCESS. SAVES COAL and LABOUR AND INCREASES OUTPUT BY DOING AWAY WITH PUMPING. (Cost of work recouped in a few months, and permanent results guaranteed.) Llay Hall Collieries, Wrexham, 2 wet shafts, linings cemented. Monk Bretton Colliery, Barnsley. Wrexham and Acton Collieries, Wrexham, 2 wet shafts, linings cemented. References: Wigan Coal and Iron Co. Ltd., Parsonage Colliery, Leigh, Lancs., 2 wet shafts, linings cemented. Risehow Colliery Co. Ltd., Flimby, 2 wet shafts linings being cemented. Pinxton Collieries Ltd., Pinxton Collieries, Alfreton, one wet shaft lining being cemented. SHAFT-SINKING By FREEZING or CEMENTATION. Llay Main Collieries, Wrexham, 2 shafts sunk by freezing. BY PRODUCT COKING PLANTS 440 OVENS AT PRESENT UNDER CONSTRUCTION IN ENGLAND. COAL WASHERS (“BRITISH BAUM” SYSTEM). 47 PLANTS WORKING OR UNDER CONSTRUCTION IN GREAT BRITAIN. BRITISH MANUFACTURE THROUGHOUT. SIMON-GARVES L° MANCHESTER Phone: 8200’City, Manchester (8 lines). Telegrams: “Simcar,. Manchester.”^