Mat 16, 1913. THE COLLIERY GUARDIAN. 999 2 GRANDS PRIX. ■ 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 S inches in Limestone in one month. 276 yards 20 inches in Granite in one month. AU COMPRESSED AIR TOOLS for Mining, Quarrying and Excavating. Shaft Sinking, Tunnelling, Drifting, 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— A. KLEIN, Mining Engineer, Dronfield, near Sheffield. RUDOLPH MEYER A.G., Mulheim-Rubr. Do mot miss Stand Hotr C9 at the Jlininy Machinery Exhibition, Hoy al Ayricultaral Hall, London, May 39 to June 1, 1913. MORE POWER TO THE MILL. You can have more power at your service without increasing your power consumption if you transmit it bv the RENOLD Silent Chain Gear The principle of chain gearing ensures 98 per cent, efficiency and quiet running The name “ Renold” on chain gearing ensures highest grade of material and workmanship, and a silent chain that has never been equalled for durability and accuracy. For driving Eineshafts, Countershafts, for short drives, for drives in awkward, damp, or oily places, Renold Chain has many advantages, which are explained in our 130 page Illustrated Book. “ Renold Driving Chains and Their Use.” Free on application. HANS RENOLD Ltd. (Dept. 65), Progress Works, MANCHESTER. E 210. MACHINES. MAKES Makers READY FOR USE IN