December 15, 1916. THE COLLIERY GUARDIAN. 1155 “HARDIAX” “ ALL STEEL ” Coal-Cutter (Patented). 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 PATENT PICK CO. LTD., SHEFFIELD.