Case for glass negative by John Herschel, 1839.

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

Case for glass negative by John Herschel, 1839.
3 6 c m
actual image size: 32cm x 28cm


This case was for a photograph of William Herschel's forty-foot telescope, which was the earliest known photograph on a glass negative. The image has deteriorated badly and is barely visible. Sir John Herschel (1792-1871), was an English astronomer, mathematician and chemist and son of Sir William Herschel. Herschel introduced 'hypo' (thiosulphate) as a photographic fixerative and discovered the cyanotype or blueprint process in 1842.

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

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