February 15, 1918. THE COLLIERY GUARDIAN. 315 Stokers On War, Admiralty, and Crown Agents’ List. Little Hulton, Bolton ; & 28, Victoria St., London, S.W. 1 War Output can be increased by using “ Bennis Estab. 1893. May we quote you ? A. A. TATTERS ALL & Co., Makers, Blackburn. We make VITRIFIED Corundum wheels for cutter and internal grinding, and SEMI-VITRIFIED Abrasive wheels up to 48 in. dia. for general work. Also Machines. I 'HE boiler house of a large Steam Coal Co., using “ Bennis” Stokers fed by a Chain Conveyor. “Bennis’’ Stokers will burn the worst pit rubbish, pond settlings, and belt pickings with complete success. Millfurnishers, Ironmongers & Shipchandlers, &c. HALL & HALL, 47, Leadenhall Street, London, EC.3 Telegrams—** Turps, London.” Telephone—Avenue 6366 (3 lines). HALLITE HIGH PRESSURE STEAM AND MOTOR JOINTINGS - ... ., _________________________________________ I ■ . JL Ferodo Friction Surfaces. The success of Ferodo fabric has demonstrated how great the need was for it. It is now used in every branch of engineering —wherever brakes and clutches are to be found. It is the most trustworthy lining made, stringent tests proving the quality of each weaving before it leaves our works. If you are interested in increasing the margin of safety on your winders or obtaining a larger output from your plant—let us give you exact data which will enable you to employ Ferodo fabric to the greatest advantage. Our unique experience, extending over 20 years, is entirely at your service. IHBEBIBBI FRICTION SURFACES. Contractors to ths War Office and Admiralty, London General Omnibus Company, and Underground Electric Railways of London and Paris. List H from THE HERBERT FROOD CO. LTD., Work.-CHAPEL-EN-LE-FR.ITH. Depots at London, Birmingham, Belfast, Bristol, Cardiff, Edinburgh, Glasgow, Liverpool, Manchester & Newcastle. Agents for India: THE ASBESTOS & BELTING CO., C4 3 & 4, Waterloo Street, CALCUTTA. iFjyou I-iire complete S>aFeFy ls>amp Equipments From Ackroyd sBest. Ltd. The Worlds SaFety Is amp Experts, JMoFLLEY, Nr.JLeeDS./ your perplexing worries will eease. J % The Hailwood Combustion Tube Lamp / J