The Diamond Drill.

Scarce c.19th engraving of the famous American diamond drill, manufactured by the Pennsylvania Diamond Drill Company, of which some specimens had been purchased by the Victorian Government. One these had been set regularly to work during the month at Castlemaine. The engraving also shows a piece of the solid “core” brought up from the bore, and shows the cutting face of the drill, given in actual size. The Victorian Government hope that the use of the drill will be attended with highly beneficial consequences on mining prospecting in this colony.

From the original edition of the Australasian Sketcher.

Collections:
National Library Australia: Bib ID 914558
State Library New South Wales: REF1/MAV/FM4/9236-9239
State Library Victoria: PCINF AS 06-09-73 P.104