658 THE COLLIERY GUARDIAN. March 20, 1914. GEORGE FLETCHER & CO. LTD.. MASSON & ATLAS WORKS, DERBY, are now the Sole Licensees & Makers of THE Capell Fan ENQUIRIES PROMPTLY DEALT WITH. piwjiraniOTt.-wBti g MOST IMPORTANT POINTS to have in mind when purchasing Machine-cut Gearing. GENUINE mi DOUBLE HELICAL DEARS Offer all this and more. Made from specially selected material, with teeth accurately cut in one continuous piece direct from the solid-they are an ideal drive for heavy power transmission. SILENT RUNNING. David Brown & Sons Ltd., Huddersfield. EDWIN LEWIS & SONS WOLVERHAMPTON. Telegrams—Lewis, Wolverhampton/’ Telephone—No. 15 Wolverhampton. 'WORKS- Patent Iron Tube Works, Monmore Green. Britannia Tube Works, Ettingshall. JO/A/T _ i FOUNDED 1895. THE QUARRY, The Organ of the Stone, Marble, Slate, Lime, Clay and Cement Trades, Circulating amongst QUARRY OWNERS and MANAGERS, ARCHITECTS, ENGINEERS, SURVEYORS, STONE MERCHANTS, &c. Price— 6d. monthly. Annual Subscription, 7s. 6d. post free (payable in advance). Offices— 30 & 31, Furnival Street, Holborn, London, E.C. TUBES OF ANY SIZE For Compressed Air, Water or Steam, or any description of London Office—143, CANNON STREET, E.C. Liverpool Warehouse 58, South John Street. Original Inventors of Loose Flanged Tubes COLLIERY WORK 208 pages f’cap folio. Over a hundred illustrations and 60 plates (coloured). PRICE IQs. (IQs. 7ct. post free). RECORD OF FIRST SERIES OF THE BRITISH COAL DUST EXPERIMENTS CONDUCTED BY THE COMMITTEE APPOINTED BY THE MINING ASSOCIATION OF GREAT BRITAIN. A Record of the Experiments carried out during 1908 and 1909 at the Altofts Experiments Station. PUBLISHED BY — THE COLLIERY GUARDIAN CO. LTD., 30 & 3U Furnival Street, Holborn, London, E.C.