Screw Micrometer, said to have been made by James Watt, probably 18th century.

Screw Micrometer, said to have been made by James Watt, probably 18th century.
3 5 c m
40cm
actual image size: 32cm x 27cm

Description

A micrometer is a gauge for accurately measuring small distances, thickneses etc. James Watt,(1736-1819). Scottish engineer and instrument maker who invented the modern steam engine which became the main source of power in the textile mills in Britain.

© Science Museum / Science & Society Picture Library

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