March 30, 1917. THE COLLIERY GUARDIAN. 619 MARK PLOWRIGHT BROS. LTD., Brampton Iron Works, Chesterfield. AIR WASHER '» ** . r i. r ' ♦ w r*■■■ * For Cooling Turbo-Generators and supplying clean air to Compressors. Thorough Washing. The air current is brought into intimate contact with a very fine mist, and all particles of foreign matter are removed either in the spray chamber or by means of the scrubber plates. Elimination of Free Moisture. A series of carefully - designed eliminator plates removes all free moisture from the air current, which passes out of the Washer in a cool and pure state. Economy in Water. The water is recirculated, passing on its way to the spray nozzles through two sets of Filters. Write for Publication No. 1013 C. DAVIDSON & Co. Ltd., Sirocco Works, BELFAST. 6< TO &% SAVING IN FUEL, or 1 2^ TO 1 5% MORE STEAM SINGLE HOOD Circulator 39, Victoria Street, London, S. W. 1 MECHANICAL ENGINEERING OF COLLIERIES. T. c. f’Jtbrs. Vol. I., Price ais. net (By post 21s. 8d.i. Vol. II., Price io». 6d. net (By post Ils.). SUPPLEMENTARY VOL.—Price ios. 6d. net (By post Ils.). THE COLLIEEY GUABDLAN CO. LTD.. 30 A 31, Furnival Street, Holborn, London, E.C. 4 FUEL OIL for industrial furnaces, Diesel engines & merchant ships. We supply a clean, high-grade fuel oil. Brotherton & Co. Ltd WORKS— Birmingham Glasgow Leeds Liverpool City Chambers, Leeds WORKS- Middlesbrough Sunderland Wakefield Workington Speciality— COAL SCREENING s CONVEYING a Ml ■ l&M: * SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER. CONSIDERABLY OVER I flffe m A Al TO Now AT work |N VI n HI | % GREAT BRITAIN IUU I LHI1 I 0 AND ™E C0L0NIES- Estimates and Designs on application Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon. Walter Scott Ltd. Leeds, LEEDS STEEL WORKS, England. MANUFACTURERS OF BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS, TRAMRAILS AND PERMANENT WAY RAILS, &0. Pit Head Frame. . Erected in Works for Inspection. Example of 10 in. x 6 in. x 42 lb. R.S. Joists curved for Framework to Roadway. ROLLED STEEL JOISTS for PIT PROPS, FRAMEWORK TO ROADWAYS. &o. STRUCTURAL STEELWORK FOR BUILDINGS, &c. 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.