October'll, 1918. THE COLLIERY GUARDIAN. 751 “ BLAKEBOROUGH ” VALVES. PLOWRIGHT BROS. LTD., Brampton Iron Works, Chesterfield- Speciali ty COAL SCREENING > CONVEYING BEST FOR ALL PURPOSES. J. BLAKEBOROUGH & SONS LTD BRIGHOUSE, YORKS. '<■ kA SECTION OF SCREENING PLANT AT BENTLEY COLLIERY DONCASTER. CONSIDERABLY OVER 100 PLANTS NOW AT WORK IN GREAT BRITAIN AND THE COLONIES. Estimates and Designs on application. J; J - I 66 MECO55 Hammer Drill The rapidity with which this little tool drills into coal or stone of medium con- sistency is one of its features. This is owing to the patent Flap Valve which is the most flexible on the market, and which does not deteriorate but improves with use. This drill will bore a 4 ft. hole in coal in one minute. In the manufacture of the “Meco ” only the best forged steel is used ; wearing parts being specially hardened and ground to gauge. This form of con- struction results in a tool which is un- surpassed for durability and low spare part cost. The “ Meco” is made in 3 sizes, the larges! of which drills holes up to 20 ft. deep. PROMPT DELIVERY IF YOU ORDER AT ONCE. THE MINING ENGINEERING CO. LTD., “ Meco ” Works : Moorfields, Sheffield. Telephone No. 4530 Central (2 lines). Telegrams—“ Meco, Sheffield.”