1224 THE COLLIERY GUARDIAN. December 17, 1915. 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. Iron and Steel Tubes. Improved Albion I.oose 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. BIRMINGHAIVI—Broad Street Chambers. LONDON—Winchester House, Old Broad Street. POLE LINE MATERIALS. Copper Wire and Strands, Insulators, Ironwork, Poles and Cross Arms, Guard and Stay Wires, Lightning Arresters, Earth Plates, &c. BRITISH INSULATED & HELSBY CABLES LTD., PRESCOT, Lancashire.