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Notebook belonging to Sir John Herschel's, English astronomer, 1839.

Herschel, John F W (John Frederick William), Sir

Notebook belonging to Sir John Herschel's, English astronomer, 1839.
2 7 c m
40cm
actual image size: 32cm x 19cm

Description

Pages from an experimental notebook of Sir John Herschel (1792-1871) dated 11-13 February. The page shows photogenic drawing negatives with notes on 'fixing' photographs. Son of Sir William Herschel, Sir John Herschel introduced 'hypo' (thiosulphate) as a photographic fixerative and discovered the cyanotype or blueprint proces in 1842.

Image Details

Image Ref.
 
10305178

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