November 13, 1914. THE OOLL1EKY GUARDIAN. 1013 Walter Scon Ltd. Leeds, LEEDS STEEL WORKS, England. LEECH, GOODALL & Co. Telegrams :— “Vertical, Leeds.” Telephone :—1982, Leeds. LEEDS. MANUFACTURERS OF BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS, TRAMRAILS AND PERMANENT WAY RAILS, &c. Head Frame. Erected in Works for inspection. Example of 10 in. x 6 in. 421b. R.S. Joists carved for Framework to Roadway. LE.ECH, GOODALL & C9 LEEDS. MAKERS AND ERECTORS OF SCREENING PLANTS, PICKING BELTS, SCREENS, PITHEAD GEARS. ROLLED STEEL JOISTS for PIT PROPS, FRAMEWORK TO ROADWAYS. &c. 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. BUNKERS, ROOFS, STEEL STRUCTURAL WORK, &c. GAS RETORT INSTALLATIONS, CONVEYING PLANTS. Representatives:—H. L. CHESTON, Clarendon House, Boston Spa, Yorks. W. OGDEN DAYSON, 1, Mount Street, Swansea, for South Wales. BOILER HOUSE ECONOMY. ALBERT FR0ST&C9, HOWARD STREET, SHEFFIELD. WIRE: “flLFRO,SHEFFIELD.’ , ’PHONE*. .4366,CENTRAL. CODE*. fl.B.C. 4-T* E9, NAILS THESPECUTL-LINES- WEHffNDLE QUICKEST DELIVERY GURRaNTEED f DOG SPIKES PATEUV , 1 GALVANIZED WIRE The Heywood Patent Furnace Bars and Smoke Burner Combined. . . V .. ~ v The illustration shows the Bars made in 5 ft. or 6 ft. lengths, with ribs cast on. This Bar has been designed to meet the requirements of Collieries, Steel Works, Forges, Locomotives, Steamers, and all other types of Furnaces that are very hard fired. Write for Catalogue and price to— The “HEYWOOD” AIRTIGHT DAMPER CO. LTD., Grove Foundry, Gomersal, LEEDS. PREVENT GOAL MINE EXPLOSIONS by dusting your mine with stone ground in the GIANT GRIFFIN MILL, As supplied to the leading Collieries. Advantages— MAXIMUM PERCENTAGE OF “FLOUR” OR IMPALPABLE MAXIMUM FINENESS. POWDER. MAXIMUM OUTPUT. MINIMUM POWER. MINIMUM WEAR AND TEAR. No Auxiliary Apparatus required for Finishing the Product. Heavy Construction. OVER 3,000 CRIFFIN MILLS INSTALLED. Also extensively used for grinding: COAL. LIMESTONE. POUTLAND CEMENT. PHOSPHATE ROCK. ORES OF ALL KINDS. Full particulars on application to— BRADLEY PULVERIZER CO, 37, WALBR00K, LONDON, E.C.