Feathers, c 1840.
3 2 c m
40cm
actual image size: 32cm x 24cm

Description

Photogenic drawing by Sir John Herschel (1792-1871). Herschel, an English astronomer, mathematician and chemist, was the son of Sir William Herschel (1738-1822). He introduced 'hypo' (thiosulphate) as a photographic fixative and discovered the cyanotype or blueprint process in 1842.

© National Museum of Science & Media / Science & Society Picture Library

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