Skip to content

Please be aware that some material may contain words, descriptions or illustrations which will not reflect current scientific understanding and may be considered in today's context inaccurate, unethical, offensive or distressing.

The Royal Society: Science in the Making

Copy letter, from Sir John Herschel to Isaac Todhunter, dated at Collingwood

Reference number: HS/24/139

Date: 19 January 1866

Description

Copy of a letter. Describes the problem of 'probability of three points on a plane forming an acute triangle.' Notes Augustus De Morgan has the same solution to the problem.

Reference number
HS/24/139
Earliest possible date
19 January 1866
Page extent
2 pages
Format
Manuscript
Also available on Epsilon
View Also available on Epsilon (external link, opens in new tab)

Creator names

John Frederick William Herschel

View page for John Frederick William Herschel

Sir; John Frederick William Herschel

Use this record

IIIF manifest

View​ IIIF ​ manifest Opens in new tab

Open in Mirador viewer Opens in new tab

Export this record

Download PDF Opens in new tab

Citation

John Frederick William Herschel, Sir; John Frederick William Herschel, Copy letter, from Sir John Herschel to Isaac Todhunter, dated at Collingwood, 19 January 1866, HS/24/139, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/hs_24_139/copy-letter-from-sir-john-herschel-to-isaac-todhunter-dated-at-collingwood, accessed on 10 July 2025

Link to this record

https://makingscience.royalsociety.org/items/hs_24_139/copy-letter-from-sir-john-herschel-to-isaac-todhunter-dated-at-collingwood

Embed this record

<iframe src="https://makingscience.royalsociety.org/embed/items/hs_24_139/copy-letter-from-sir-john-herschel-to-isaac-todhunter-dated-at-collingwood" title="Copy letter, from Sir John Herschel to Isaac Todhunter, dated at Collingwood" allow="fullscreen" frameborder="0" width="100%" height="500px"></iframe>

Hierarchy

This item is part of:

Related Fellows

Map

Explore the collection

  • 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