John Leslie, Scottish mathematician and physicist, early 19th century.

 
John Leslie, Scottish mathematician and physicist, early 19th century.
4 0 c m
 
35cm
actual image size: 27cm x 32cm

Description

Engraving of Sir John Leslie (1766-1832). After completing his studies at St Andrews and Edinburgh, Leslie travelled as a tutor in America and Europe. He invented a differential thermometer, a hygrometer (for measuring humidity), and a photometer (for measuring the intensity of light). In 1810 he created artificial ice by freezing water under an air pump.

Image Details

Image Ref.
 
10400434

© Science Museum / Science & Society Picture Library

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