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The Royal Society: Science in the Making

Copy letter, from Sir John Herschel to James David Forbes, dated at Collingwood

Reference number: HS/22/122

Date: 2 June 1842

Description

Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Compares actinometric measurements of radiation. Explains interest in total eclipse relative to actinometry. Discusses the possibility of making actinometric measurements by photographic means.

Reference number
HS/22/122
Earliest possible date
2 June 1842
Page extent
3 pages
Format
Manuscript
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Creator name

John Frederick William Herschel

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Citation

John Frederick William Herschel, Copy letter, from Sir John Herschel to James David Forbes, dated at Collingwood, 2 June 1842, HS/22/122, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/hs_22_122/copy-letter-from-sir-john-herschel-to-james-david-forbes-dated-at-collingwood, accessed on 25 March 2025

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https://makingscience.royalsociety.org/items/hs_22_122/copy-letter-from-sir-john-herschel-to-james-david-forbes-dated-at-collingwood

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  • Herschel Letters

    This collection of nearly 10,900 letters, drafts, copies and notes is the largest repository of scientific correspondence from and to Sir John Herschel, leading figure of Victorian science.

    Dates: 1807 - 1875

    View collection