768 [supplement PAGE VIII. ] THE COLLIERY GUARDIAN. April 12, 1918. EWARTS TYPE CHAINS COLLIERIES and MINES Elevator Buckets. Sprocket Wheels. Windmill Lane, Stratford Telegrams—“ Agrikinger, London.” GEO. W. KING Ltd., LONDON, E. 15 Telephone—18 and 662 Stratford. “PROTAN” A Commercial form of TANNIC ACID (containing 48 50 % TANNIN). In conjunction with Soda Ash Enables the Boiler User to compound the most efficient llllllllll SCALE REMOVER llllllllll at only a fraction of the cost of Proprietary Compositions. Composition can he based on analysis of water, Samples and further particulars from CLEMONS, MARSHALL & CARBERT, Branch of The Yorkshire Dyeware and Chemical Co. Ltd., Leeds- Established 1800. Brass Time Checks JOHN LAWSON A SONS, Manufacturers of every kind of STEEL STAMPS, LETTERS, FIGURES, BRANDS, STENCIL PLATES, &c. Telegrams—“ Lettering, Sheffield.’* Telephone No. 577. Roebuck Letter Works, 26, Carver Lane, SHEFFIELD. Save Money - Save Coal - Save Steam By adopting FORREST’S PATENT AUTOMATIC Cylinder DRAIN COCKS >n your Compound, Winding, Hauling, and all your Stationary Engines, Steam Winches, &c. (Thousands in use), now fixed on most new Engines turned out by leading Engineers. The Safest Automati: Drain Cock ever fixed on Com- pound Condensing Engines, most positive in action. Makers of High-class Gunmetal Gland Taps. Wheel Valves,