November 27, 1914. THE COLLIERY GUARDIAN. 1113 LOCOMOTIVES. COLLIERY HAULAGE ENGINES FOR AIR, STEAM & ELECTRICITY. FORGINGS & REPAIR WORK. YORKSHIRE ENGINE CO Westminster, S.W Telegrams:—“Engine, Sheffield.” COAL CUTTING MACHINES OF ALL TYPES. MACHINE WORK OF EVERY DESCRIPTION. LTD.. HEAD OFFICE & WORKS, SHEFFIELD. GEORGE FLETCHER & CO. Ltd., Derby, Colliery Engineers, PIT PROPS in Cast Iron or Mild Steel. PROMPT DELIVERIES. :: SEND US YOUR REQUIREMENTS. Makers of all kinds of Colliery Equipment. SANKEY DIAMETER-30" thickness I • WEICHT.ERCH436 Any Size or Weight. From Plate & Sheet Metal. Rough or Machined. Rolled or Spun Sheet Steel Work. Light Pressed Steel Wheels. General Sheet Metal Work. Foundry Ladles. Our Equipment includes 750 TON HYDRAULIC and other Presses and Stamps. Send us details of your require- ments and ive 'will quote you. Joseph Sankey & Sons, Ltd., Hadley, Salop. 1 1 3 STOP CORROSION AND SAVE EXPENSIVE REPAIRS & RENEWALS By having your ironwork coated With “ BITUMASTIC ” (Brand) SOLUTION. A Brilliant Black Anti-Corrosive Paint supplied ready for use. Used by the Principal Colliery Companies: Write for “Bitumastic” pamphlet to sole manufacturers— WAILES, DOVE & CO. LTD., NEWCASTLE-ON-TYNE. Tel. 4687 (3 lines). Telegrams—“ Bitumastic.” GRIFFIN MILLS STONEDUST. No. 6 REPORT OF THE EXPLOSIONS IN MINES COMMITTEE, whilst recommending a minimum of 50 °/o passing a 200 x 200 sieve, says emphatically“ THE FINER THE DUST THE BETTER,” con- sequently, STONEDUST PRODUCED BY THE GRIFFIN MILL SYSTEM IS THE MOST EFFICACIOUS PRODUCTION FOR THE PURPOSE, SEEING IT PREPARES:— Percentage Horse Output per hour Passing Power 200 x 200 Sieve Required Dust from South Wales Shale— 1 to 1| tons upwards 83 °/o 25 Dust from Yorkshire and other Shale—1 to 1} tons upwards 87 ,°/o 25 No other System of Pulverizing can approach the GRIFFIN & GIANT GRIFFIN MILL for Low Cost of Grinding and Fineness of Product. ---— FOR FULL PARTICULARS, APPLY 37, Wat brook, LONDON, E.C.