1220 THE COLLIERY GUARDIAN. June 30, 1916.- j—“TREFOR”— BORING AND SINKING CO., Contractors for Deep Borings and Pit Sinkings a// over the World. ------------ Bank Chambers, 329, High Holborn, LONDON, W.C. ALFRED ALLEN & SON JMP and COLLIERY TUBS In IRON, STEEL and WOOD, t^ower Gomal, nr. Dudley. Telegrams—64 Allen, Lower Gornal.” Telephone—106 Dudley. COLLIERY AIR PIPES? HUGE PRESSURES- *L/575 OM PPPl/CffPO/t. GAUGE CLASS WA5HER5 LUBRICAT0R5nc F J B. TREASURE1 £rC° VflUXHRLL R° L LIVERPOOLj LASSES “Spade” Washers For the Scottish Tube Cbmpany’s Tubes, and others. JOHN E. KEIRBY & SONS LT° SWINTON, near MANCHESTER. Telegrams—“ Keirby,” Swinton, Manchester. Established 1864. (The word “SPADE” is a Registered Trade Mark.) Patented 1902, 1906 and 1910. Automatic Detmcliment. The 1911 lever has large lateral stops and a wedge-shaped head. Drop-forged shells (two sizes), levers (four sizes), catches and couplings. SMALLMAN patent HAULAGE CLIPS. New Models Nine Sizes. Illustrated Catalogue. Clips can be had without catches Patentee and Sole Manufacturer:— JAMES W. SMALLMAN, Nuneaton, England. --SIZES — TO CARRY 3 and 5 TONS. With or Without Tipping Bodies. 111 MANN’S STEAM CART & WAGON Co. Ltd., Hunstet, LEEDS. London Office : 9, Fenchurch Avenue, E.C. THE COTTON POWDER Co. Id Manufacturers of Explosives for Mining Purposes. REX POWDER NEW PERMITTED EXPLOSIVE For all kinds of work. HEAD OFFICE: 24, WALBROOK, LONDON, E.C.