May 18, 1917 THE COLLIERY GUARDIAN, 971 STEWARTS and LLOYDS, Ltd 41, Oswald Street, GLASGOW Broad Street Chambers, - -BIRMINGHAM. Winchester House, Old Broad Street, LONDON. We have supplied HIGH PRESSURE MIN STEAM PIPE & INSTALLATIONS •f to many of the largest Collieries, Electric Power Stations, and other users. TUBULAR STEEL PIT PROPS Exceptionally strong and durable. Can be used repeatedly and have a high factor of safety. Wrought Iron and Steel Pipes for Hydraulic Stowing Screwed and Coupled Tubes (Black and Galvanized) for Air, Steam, Water, &c Tubular Steel Poles for Electric Lighting, Telegraph and Telephone. STEEL PLATES Catalogues sent on application STEEL CASTINGS,