April 28, 1916. THE COLLIERY GUARDIAN. 793 oo a Keith Fans. /TUB / BOLTS fcupSjS, zsk Union “Rand I Keith Keith Mine Fan Plant. Induced Draught Plant. COMPLETE PLANTS ALSO FOR Dust Exhausting, Forge Blowing, Cupola Blast, Smoke Removal, &c. HOWARD STREET James Keith & Blackman C° Ltp 27, Farringdon Aveniie_________LONDON. And at Manchester, Newcastle, Cardiff, Leeds, Glasgow, Edinburgh, &c. Telegrams : “ Future, Middlesbrough.” COAL DISTILLATION COMPANY, Middlesbrough. BY-PRODUCT COKE OVENS, WITH AND WITHOUT REGENERATORS. HUSSENER & CO LUN SYSTEM. DIRECT RECOVERY SYSTEM. Largest Yield of By-Products. No Re-heating of Gases. BENZOL PLANTS. TAR DISTILLATION PLANTS. Large number of Plants in operation in Great Britain and on Continent. PRINCEPS PATENT “DEFLECTOR” OIL SEPARATOR. Capacity, 300,000 lbs. of steam per hour, 60" diameter main. ONE OF THE LARGEST EXTRACTORS MADE IN THIS COUNTRY. PRINCEPS & CO., Engineers, SHEFFIELD. IIIIIIIIIIIIIIIIIIIOIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIilllllllllllllllllllllllM Full particulars on application to— BRADLEY PULVERIZER CO. 37, WALBR00K, LONDON, E.C. PREVENT COAL MINE EXPLOSIONS by dusting your mine with stone ground in the GIANT GRIFFIN MILL, As supplied to the leading Collieries. AMAXIMUM 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. PORTLAND CEMENT. PHOSPHATE ROCK. ORES OF ALL KINDS.