396 THE COLLIERY GUARDIAN. September 1, 1916. “HARDIAX” “ ALL STEEL” Coal-Cutter (Patented). (D ABSOLUTELY UNEQUALLED BY ANYTHING HITHERTO PLACED ON THE MARKET. Fastest and most durable percussive coal- cutter extant-------Steel from end to end. 30 “Hardiax” machines have been installed by a large North of England Colliery Company. Ask for New Catalogue. TRIALS ARRANGED. THE HARDY PATENTPICK CO. LTD., SHEFFIELD.