732 THE COLLIERY GUARDIAN. April 12, 1918. “HARDY” AIR PICK for Colliery Work Every Modern Colliery should use this new Labour-Saving Tool. Can be used for dozens of jobs underground. WEIGHT 15 lb. Try the “Hardy” Air Pick for dressing up corners in headings, for taking down shale bands, for cutting girder holes, in fact, wherever the work is hard and slow for an ordinary pick. For Coal getting in hard laminated Coal, the “ Hardy” Air Pick will prove invaluable. OVER 125 ORDERED DY ONE COLLIERY THE HARDY PATENT PICK CO. LD