November 8, 1918. THE COLLIERY GUARDIAN. 963 "BLAKEBOROUGH” VALVES. PLOWRIGHT BROS. LTD., Brampton Iron Works, Chesterfield. Special ity- COAL SCREENING & CONVEYING BEST FOR ALL PURPOSES. J. BLAKEBOROUGH & SONS I™ BRIGHOUSE, YORKS. * ■' . T 'vtq - <..’ L >. L ■ w- -'Jr ■.)?!’ SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER. CONSIDERABLY OVER 100 PLANTS H WORK IN BRITAIN COLONIES. Estimates and Designs on application. The “Meco” is made in 3 sizes, the largest of which drills holes up to 20 ft. deep. PROMPT DELIVERY IF YOU ORDER AT ONCE. Telephone No. 4530 Central (2 lines). Telegrams—“ Meco, Sheffield.” “MECO” 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 MINING ENGINEERING CO. LTD., “ Meco ” Works : Moorfields, Sheffield.