March 24, 1916. THE COLLIERY GUARDIAN. 579 SUPREME II 55 HARDY “SIMPLEX” Type B5. Extra light, for ripping & brushing HARDY “SIMPLEX” Type B6. Medium, for drifting, etc. HARDY “SIMPLEX” Type B7. Heavy, for sinking. These machines are in use to the number of many thousands all over the world. They have utterly defeated all competition, and stand supreme as examples of fast-boring rock drills of immense durability and superb engineering finish. TRIALS ARRANGED. THE HARDY PATENT PICK CO. LD. SHEFFIELD.