Treadle lathe, made by Henry Maudslay, c 1812-1820.

Treadle lathe, made by Henry Maudslay, c 1812-1820.

A Maudslay lathe, 1812-1820.

Henry Maudslay, English precision toolmaker and engineer, c 1800.

Napier's Bones, c 1690.

Set of divination bones, South African, 1880-1920.

Palm nuts with cloth bag, Nigeria, 1880-1920.

Spring steel slave whip, 1801-1900.

Medicine-woman from Tembuland, South Africa, 1900-1925.

Napier's Bones, 1671-1700.

Bronze surgical knives, Egypt and Mesopotamia, c 600-200 BC.

Napier's bones, c 1690.