July 28, 1916. THE COLLIERY GUARDIAN. 151 £ JEFFREY COAL CUTTERS Have again and again throughout the country proved themselves to he the best. There are three good reasons why you should try a Jeffrey Coal Cutter. FIRSTLY.—We supply you with a machine on a thirty days FREE working trial. SECONSJLY.—We pay carriage both ways if unsatisfactory. THBRS3L Y.—We make no charge for training men to run our machine during trial. HUGH WOOD & Co. LL° Newcastle-on-Tyne. SPECIALISTS IN GEORGE FLETCHER&CO.LTD. DERBY COLLIERY, MINING & CEMENT WORKS PLANT. Walter Scon Ltd. Leeds, LEEDS STEEL WORKS, England MANUFACTURERS OF BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS, TRAMRAILS AND PERMANENT WAY RAILS, &c. UNDER GOVERNMENT CONTROL. PIT CAGES Patent Kep Gear. Cages to carry 12 Tubs which are Banked Simultaneously. London Office : 21, Mincing Lane ’Phone: 2813 Avenue. ’Grams: “ Amarilla, Fen, London.” Example of 10 in. x 6 in. 421b R.S. Joists curved for Framework to Roadway. Pit Head Frame, k Erected in Works for inspection. TCI pphone: 817 (2 lines). 1 Cr L/ Cr grams : “Amarilla, Derby.’ ROLLED STEEL JOISTS for PIT PROPS, FRAMEWORK TO ROADWAYS. &c. STRUCTURAL STEELWORK FOR BUILDINGS, Ac. ; Mild Steel Blooms, Billets, Slabs, Tinbars, Rounds & Flats. Rolls cut for Special Sections and to approved quantities. Books of Sections and other information on application.