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Drill(?), steel, plated, by Aubry, French, late 19

1871-1900

Drill, brace and bit type, brace only

Drill, flint arrowhead and wooden shaft

1918-1920

Drill, brace and bit type

1501-1800

Bow drill with bronze drill, date about 1370 BC, found at Tel El Amarna, Upper Egypt, in winter season of 1921-22.

Bow Drill with Bronze Bit

circa 1370 BCE

Atlas Copco "Dentalair" turbine dental engine on detachable wheeled stand, Swedish, 1958-1965

Atlas Copco "Dentalair" turbine dental engine on detachable wheeled stand

1958-1965

Model, scale 1:4, of Jethro Tull's seed drill, c. 1701

1:4 scale model of Jethro Tull's seed drill

1695-1705

Bow drill, incomplete, by Jean Evrard, 35 Charles Street, London, England, 1839-1865.

Bow drill

1839-1865

A quantity of Morse-taper drills, machine reamers and counter boring tools

A quantity of Morse-taper drills

Two small high-speed pneumatic powered dental drills fitted with air bearings. Both are sectioned to reveal channels for compressed air and for air and water cooling and each mounted on its own board with a magnifying glass to give an enlarged vew of the air turbine which gives an operating speed of 500,000 rpm at 55 psi. Made 1970-80.

pneumatic dental drills

1970-1980