June 1, 1917. THE COLLIERY GUARDIAN. 1059 THE STRONGEST PERMITTED DYNOBEL No. 3. ARRANGE TRIALS WITH NOBEL’S EXPLOSIVES CO. LTD., GLASGOW. PIPING INSTALLATIONS. WATER, STEAM, OIL, AIR, GAS. HYDRAULIC. J. W. HOUSTON & Co , Partick Cross, GLASGOW J. WALKBE HOUSTON, Sole Partner. Bargains in BELTING EVERY DESCRIPTION. For DRIVING or CONVEYING. Up to 30 in. wide in stock. F. WATKINSON «& CO. Belting Manufacturers, HALIFAX, England. Jgl 59 BARSBY&C® ---------—{1 On Admiralty ■MMCTnfy/. .:.k . ■ . I List I of Contractors. 1 John Russell & Co. Ld ~ ALMA TUBE WORKS, WALSALL. FITTINGS OF ALL KINDS AND FOR ALL PURPOSES The PREMIER Screen in the WORLD is n’s Patent Horizontal Main Screen REQUIRES NO SPECIAL FOUNDATION. Will work continuously WITHOUT BOLTING DOWN. Will Screen more efficiently than any other screen. Over 150 Screens now at work. For PERFECTsizing&loading USE PULSATING CONVEYORS AND PULSATING LOADING JIBS (NORTON’S PATENTS). NORTON’S PATENT HORIZONTAL MAIN SCREEN AND COMBINED PICKING CONVEYOR, fitted with our Patent Air Cushioning Cylinders. The Screen illustrated is 5 ft. 6 in. wide, having four decks, and will deal with 125 tons of coal per hour separated into four sizes, and passing the large coal without any fall to the Picking Conveyor. NORTONS (TIVIDALE) Ltd., HECLA Works, Tipton, England.