June 6, 1913. THE COLLIERY GUARDIAN. 1161 2 GRANDS PRIX. I Diplome d’Honneur. International Exhibition, Brussels, 1910. Kgl. Preussische. Staatsmedaille, 1911. Dusseldorf, 1902. HIGH PRESSURE COMPRESSORS. COMPRESSED AIR HAULING LOCOMOTIVES up to 3,000 lb. per square inch. High Pressure Pipes. Valves and Charging Apparatus. Low Pressure Compressors and Turbo Compressors. COMPRESSED AIR HAMMER DRILLS holding WORLD’S RECORD for work done in Loetschberg Simplon Tunnel = 327 yards 8 inches in Limestone in one month. 276 yards 20 inches in Granite in one month. All COMPRESSED AIR TOOLS for Mining, Quarrying and Excavating. Shaft Sinking, Tunnelling, jDrifttng, and all kinds of Mining Work undertaken by Contract with our own men and tools. Write for Estimates to our Sole Agent for Great Britain— k. KLEIN, Mining Engineer, Dronfield, near Sheffield RUDOLPH MEYER A.G., Ruhr. not miss Stand 31, Hoiv V, at the Hininy machinery Exhibition, Royal Agricultural Hatt, London, Hay 39 to June 1, 1913. FANS For Mine Ventilation, Induced Draught, &c., &c. We also Specialise in f DUST REMOVAL & COLLECTION, FORGES, HIGH PRESSURE FANS, SINKING FANS, PIPING, &c. The STANDARD ENGINEERING Co. Ld , LEICESTER. n GOSFORTH FOUNDRY Co. Ltd., Malleable Ironfounders, DRONFIELD, near SHEFFIELD. Makers of all kinds of Driving and Elevator Chains, Sprocket Wheels, Elevator Buckets, &c.