January.19, 1917.	THE COLLIERY GUARDIAN. *	109

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HARDY “SIMPLEX”

Type B6.

Medium, for
drifting, etc.

HARDY “SIMPLEX”

Type B7.
Heavy, for sinking.

HARDY “SIMPLEX”

Type B5.

Extra light, for
ripping & brushing.

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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.