Letter, from Henry Oldenburg to Jean Cassini, dated at London

Reference number: EL/O2/55

Date: 26 August 1671

Description

That Brouncker had been shown Cassini's paper on the sunspots; encloses pages of Boyle's observations of the sunspots made in 1660; concerning Huygens' 'Systema Saturnium'; concerning observations of the occultation of Saturn by the moon by Hevelius; postscript that Monsieur Picard had observed the sunspots in 1661 and that some English astronomers had just observed a sunspot on 25 August 1671

Reference number: EL/O2/55
Earliest possible date: 26 August 1671
Page extent: 3 pages
Format: Manuscript
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Creator name

Henry Oldenburg

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Citation

Henry Oldenburg, Letter, from Henry Oldenburg to Jean Cassini, dated at London, 26 August 1671, EL/O2/55, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/el_o2_55/letter-from-henry-oldenburg-to-jean-cassini-dated-at-london, accessed on 18 April 2025

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https://makingscience.royalsociety.org/items/el_o2_55/letter-from-henry-oldenburg-to-jean-cassini-dated-at-london

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Hierarchy

This item is part of:

'Early letters': letters from correspondents in natural philosophy sent to the Royal Society and its Fellows
1613-1740 Reference number: EL
Early Letters O2
1669-1736 Reference number: EL/O2

Related Fellows

Jean Dominique Cassini
Recipient
Henry Oldenburg
Author

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Early Letters

The archival collection known as 'Early Letters' is composed of original manuscript letters sent to, or collected by, the Royal Society from English and foreign correspondents.

Dates: 1613 - 1740

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