714 ____ Wrought SPECIAL JOINT. These Tubes are specially suitable for mines, being both light and strong The Joint, as illustrated, can be easily connected, and a tube can be removed without disturbing the run. Fittings of all kinds supplied. THE COLLIERY GUARDIAN. Iron and Steel Tubes. October 8, 1915. Improved Albion Loose Flange Joint, PIT PROPS. We manufacture Tubular Steel Pit Props, which are exceptionally strong and durable. They can be used repeatedly and have a high factor of safety. Lists sent on application. STEWARTS and LLOYDS LTD., GLASGOW-41, Oswald Street. BIRMINGHAM-Broad Street Chambers. 1*0NDON-Winchester House, Old Broad Street. ______ AULD’S PATENT STEAM REDUCING VALVES Also Makers of Special FULL BORE Patent Steam Reducing Valves for Blowing, Winding, Pumping and other | Engines, and for supplying Surplus or other steam from high to low pressure boilers, &c. ___________ DAVID AULD & SONS, Patentees Makers, LTD. Whitevale Foundry, GLASGOW. STEEL & FILES. FANSHWE & MARRIOTT ATKINSOAN, Steel and File Manufacturers, Ecclesfield, near Sheffield. Telegraphic Address: ’* Fanaha, Ecclesfield.0 ... STUDY your HORSES with ECONOMY. FOOD PREPARED IN HALF THE TIME WITH HALF LABOUR. . . PATENT DUST EXTRACTORS, SIFTERS, & MIXING MACHINERY. MILLING ENGINEER, Telegrams— W' TTp Telephone— Elevator, Leeds.’* 3241 Two Lines. GEORGE PORTEUS, CEMENTATION ___________ Shaft Sinking and Drift Driving through any kind of Water-bearing Measures, by Improved Patent Cement- ation and Chemical Processes. Concrete Lining a speciality. Feeders of water existing In Shafts or Levels treated. Seventeen Shafts already cemented in England In the last two years. Complete Estimates given on application. ALBERT FRANCOIS, Whitehouse Chambers, DONCASTER. THE COTTON POWDER Co. Ld Manufacturers of Explosives for Mining Purposes. REX POWDER NEW PERMITTED EXPLOSIVE For off kinds of work. HEAD OFFICE: 24, WALBROOK, LONDON, E.C.