February 25, 1916. THE COLLIERY GUARDIAN. 385 “ LOW-BUILT ” COLLIERY CRAB. PILLAR HOIST. Winds ANY LIFTING TACKLE. height. WORM GEARED OVERHEAD TRAVELLING GRAB. WALL HOIST. Winds ANY Height. TWIN BARREL” CRAB HYDRAULIC TOOLS. s A- ASK FOR LIST No. 28. Ryland Street Works, YOUNGS, BIRMINGHAM. Patent No. 7638. and Patents Nos. 7241 and 17607 applied for. LOWER 12 RAISE; Slower .STEADILY. RAISE’ -STOP, <4 5 J 9\ k 8 WINDING SIGNALS “ NON-CUMULATIVE.” DAVIS’S SelLContained SOLENOID BELL with DIAL INDICATOR. Simple, Efficient, Inexpensive. SEND FOR LIST 41 V. JOHN DAVIS & SON (DERBY) LTD., All Saints Works, DERBY; and 17, Victoria St., Westminster, London, S.W. Phone—240 Derby. Telegrams—“ Davis, D rby.” Steel Underframe Railway Car- riages, Tram ars, and Wagons of every description for Bir: and Sale by Immediate or Deferred Pay- ments. Ironwork, Wheels and Axles. WAGONS. Also Wagons with Oak Underframes Makers of HYDRAULIC PRESSED BOSS and other WHEELS and AXLES. PRESSED ST EE He BOGIES. Wagons for Hire, capable of carrying Six, Eight and Ten Tons, part of which are con- structed specially for Shipping pur- poses. Wagons in Working Order maintained by Contract. SECOND-HAND BALLAST WAGONS FIT FOR MAIN LINE TRAFFIC. Sole Manufacturers of Dean & Churchward’s “ EITHERSIDE BRAKE,” and Marillier’s Patent “ INSTANTER COUPLING." The Birmingham Railway Carriage <& Wagon Co. WORKS : SMETHWICK, BIRMINGHAM. MECHANICAL ENGINEERING OF COLLIERIES. T. c. pbJtbR8 Vol. I., Price 21s. net (By post 21s. 8d.'. Vol. 11., Price 10s. 6d. net (By post Ils.). SUPPLEMENTARY VOL.-Price 10s. 6d. net (By post Ils.). THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C. EDWIN LEWIS i SONS. TUBES OF ANY SIZE For Compressed Air, Water, or Steam. Original Makers of “Acme” & “Williams” Loose Flanged Joints for Mining Work. Pate N’t WOLVERHAMPTON. Buyers will note that the joint illustrated is an improvement on the “ Williams ” joint, as it does without the internal ferrule. Telegrams—“ Lewis, Wolverhampton.” wan wq [Patent Iron Tube Works, Monmore Green. Telephone—Nos. 15 6 180 Wolverhampton. t Britannia Tube Works, Ettingshall. LONDON ADDRESS-143, Cannon Street, E.C. LIVERPOOL WAREHOUSE-58, South John St ROBURITE No. 3. HELD BEST RECORD for SAFETY for ac YEARS. ROBURITE N! 4 Is now BEST & SAFEST on tlie New Permitted List. NEGRO POWDER No. 2 & DREADNOUGHT POWDER Also on New Permitted List. ROBURITE and AMMONAL LTD., GATHURST, near WIGAN. LONDON OFFICE:—103, CANNON STREET, LONDON, E.C. Telegraphic Addresses : “ Roburite, Cannon, London.” “ Roburite, Gathurst.” Telephone Nos.: 141 Bank. 9 Upholland.