Correction

Full edit: Photography Through the Ages: A Complete History

Correction by Emir Baycan · accepted 12 July 2026

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Every change in this contribution, computed from the content the publisher accepted on 12 July 2026. Changed words are highlighted.

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−It was the discovery of sodium hyposulphite (hypo) as a fixer by John Herschel in 1839
+It was the discovery of sodium thiosulphate (hypo) as a fixer by John Herschel in 1839
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