January 21, 1916. THE COLLIERY GUARDIAN. 141 S “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. SENT ON FREE TRIAL. THE HARDY PATENT PICK CO. LTD., SHEFFIELD.