932 THE COLLIERY GUARDIAN. May 18, 1917. lf«SASEY0UR OtJrfi, BY USING “DIAMOND” Coal-Cutters (“DIAMOND” ENCLOSED TYPE COMPRESSED AIR COAL-CUTTER.) AND Coal-Face Conveyors (“DIAMOND” COMPRESSED AIR JIGGING CONVEYOR.) IAMONP 273 FOR POWER, RELIABILITY and OUTPUT DIAMOND MACHINES ARE UNEQUALLED. DIAMOND COAL-COTTER CO., Telegrams— \A/ A If E* ET I 17 I |T| “ Diamond, Wakefield.” IT I Lh U ■ Telephone- No. 141 Wakefield. Branch Works at UDDINGSTON, nr. GLASGOW.