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The Royal Society: Science in the Making

Copy letter, from Giovanni Virginio Schiaparelli to Robert Philips Greg

Reference number: HS/17/175

Date: 1 April 1868

Description

Copy letter with illustration and tables of positions, annotated and copied by Alexander Stewart Herschel. Discussing Greg and Alexander Stewart Herschel's theories of the trajectory of rays and in particular the fixity of radiants which Schiaparelli had computed and Greg and Herschel are proposing new hypothesis for. Includes an illustration, "Figure of the annual route taken by a ray in the boreal exliptic hemisphere, according to hypothesis 3". News of other comet observers in Italy, including Giuseppe Zezioli (c. 1830-1870) from the Telegraphic Bureau in Bergamo. Letter sent to be shared with Alexander Herschel

Reference number
HS/17/175
Earliest possible date
1 April 1868
Page extent
6 pp.

Creator name

Giovanni Virginio Schiaparelli

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Citation

Giovanni Virginio Schiaparelli, Copy letter, from Giovanni Virginio Schiaparelli to Robert Philips Greg, 1 April 1868, HS/17/175, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/hs_17_175/copy-letter-from-giovanni-virginio-schiaparelli-to-robert-philips-greg, accessed on 13 May 2026

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https://makingscience.royalsociety.org/items/hs_17_175/copy-letter-from-giovanni-virginio-schiaparelli-to-robert-philips-greg

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    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

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