322 THE COLLIERY GUARDIAN. February 15, 1918. HIGH SPEED STEEL FAMOUS x"-x (A.WA BRANDS 'AW': \premier/ in.W.I _/ OHII TRADE fHL MARK. UNIFORM QUALITY FOR CUTTING ALL CLASSES OF METALS AT HIGHEST SPEEDS. High Speed Steel Twist Drills, Milling Cutters, , Broaches & Hobs, Hand Screwing Apparatus Gauges, (Stock, Dies, Taps, Measuring Chasers, etc.), Machines. Sir W. G. Telephone No.: 6480 Central (6 lines). , WHITWORTH & CO. LTD., OPENSHA W, Manchester. “Whitworth," Openshaw.” The WATSON The Mirrlees-Leblanc Multijector Air Pump. Weight of Multijector for 5,000 kw. is 97 lbs. The MirrleesWatsonCo. Ltd., "^SPECIALISTS IN CONDENSING PLANTS Glasgow. r •DELIVERIES’ ® FROM STOCK o LSI M Pm POT&JjffiH Dos taa Tub A Bsims “union” brand RED LABEL. . O Q