June 12, 1914. THE COLLIERY GUARDIAN. 1291 I THE MONARCH OF ALL I NEW PERMITTED EXPLOSIVES Free from injurious fumes. is Maximum strength and reliability. MONARKIT KYNOCH-ARKLOW LTD., », LONDON. Walter Scott Ltd. Leeds, LEEDS STEEL WORKS. England. MANUFACTURERS OF BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS, TRAMRAILS AND PERMANENT WAY RAILS, Ac. Pit Head Frame, k Erected in Works for inspection. Example of 10 in. x 6 in. - 421b. R.S. Joists curved for Framework to Roadway. ROLLED STEEL JOISTS for PIT PROPS, | FRAMEWORK TO ROADWAYS, Ac. 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. STANLEY Trade Stanley’s Cranked Gimbal Dial. Enables sights to be taken to 90 degs. both up and down. The largest manufacturers of SURVEYING and DRAWING INSTRUMENTS in the World. Stanley’s Prismatic Compasses. 2iin. to 6in. DRAWING OFFICE STATIONERY of all kinds supplied on the most favourable terms. A very large stock kept. Please send for our“ K. 1 2 ’’Cata- logue, and com- pare our prices with those of other first-class makers. W. F. STANLEY & CO., LTD., Export Dept., Great Turnstile, High Holborn, W.C. Head Offices and Showrooms—286, HIGH HOLBORN, LONDON, W.C. Full particulars on application to— BRADLEY PULVERIZER CO, 37, WALBROOK, LONDON, E.C. 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,Or.Q GRIFFIN MILLS INSTALLED. Also extensively used for grinding COAL. LIMESTONE. PORTLAND CEMENT. PHOSPHATE ROCK. ORES OF ALL KINDS.