Search: 1850-1859 in date 
Herschel, John in author 
De Morgan, Augustus in addressee 
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Showing 1–20 of 41 items

Herschel7007

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
1850-1
Source of text:
RS:HS 23.80
Summary:

Comments on calculation by Frédéric Petit of the hyperbolic orbit of the meteor of 19 Aug. 1847.

Contributor:
John Herschel Project

Herschel7005

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[24 January 1850]
Source of text:
RS:HS 23.81
Summary:

About Henry Warburton's theorem, and the Gregorian calendar.

Contributor:
John Herschel Project

Herschel7009

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[16 March 1850]
Source of text:
RS:HS 23.85
Summary:

About JH's poor health; some problems in perspective. Having read a book on Egyptology, JH wanders off in flights of fanciful numerology.

Contributor:
John Herschel Project

Herschel7012

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[7 January 1851]
Source of text:
RS:HS 23.94
Summary:

About JH's poor health; mentions discovery of two asteroids and new rings of Saturn.

Contributor:
John Herschel Project

Herschel7014

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[28 August 1852]
Source of text:
RS:HS 23.124
Summary:

Comments on astronomical discoveries, and depressing life in London.

Contributor:
John Herschel Project

Herschel7023

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
1853
Source of text:
RS:HS 23.131
Summary:

JH looking for some writings by Isaac Newton while at the Mint, but most of that seems to have vanished.

Contributor:
John Herschel Project

Herschel7017

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[11 April 1853]
Source of text:
RS:HS 23.130
Summary:

Asks for the experience of other countries in introducing decimal coinage.

Contributor:
John Herschel Project

Herschel7019

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[9 August 1853]
Source of text:
RS:HS 23.138
Summary:

Thanks for AD's report on coinage [see JH's 1853-4-11], and for AD's puns.

Contributor:
John Herschel Project

Herschel7778

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[28 October 1853]
Source of text:
RAS: MSS Add.119
Summary:

JH's copy of Apollonius's work on conic sections was given to Francis Baily. [P. L. M. de] Maupertuis's letter to [James] Bradley is 'real prize.' Comment on AD's puns. Finds W. R. Hamilton's Quaternions 'horribly metaphysical.'

Contributor:
John Herschel Project

Herschel7028

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
1854
Source of text:
RS:HS 23.152
Summary:

Comments on circulation of new coinage, and on another integral of Henry Warburton's.

Contributor:
John Herschel Project

Herschel7025

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[2 November 1854]
Source of text:
RS:HS 23.150
Summary:

Sends Henry Warburton's equation and integral; thanks AD for humorous story sent to Collingwood.

Contributor:
John Herschel Project

Herschel7027

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[6 November 1854]
Source of text:
RS:HS 23.151
Summary:

Accepts AD's correction regarding Henry Warburton's writings [see JH's 1854-11-2].

Contributor:
John Herschel Project

Herschel7031

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[6 August 1855]
Source of text:
RS:HS 23.157
Summary:

Expresses great sorrow at the death of Richard Sheepshanks; JH has been ill for many months.

Contributor:
John Herschel Project

Herschel7035

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[6 November 1855]
Source of text:
RS:HS 23.160
Summary:

Comments on Francis Baily's travel writings and on Richard Sheepshanks's epitaph.

Contributor:
John Herschel Project

Herschel7038

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[5 December 1855]
Source of text:
RS:HS 23.162
Summary:

On AD's note on Richard Sheepshanks's writing on the standard yard.

Contributor:
John Herschel Project

Herschel7041

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[12 December 1855]
Source of text:
RS:HS 23.163
Summary:

On proper and bad Latin.

Contributor:
John Herschel Project

Herschel7045

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[19 May 1856]
Source of text:
RS:HS 23.172
Summary:

Comments on the state of JH's health, and on things astronomical and mathematical.

Contributor:
John Herschel Project

Herschel1150

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[1856-6-7 or earlier
Source of text:
RS:HS 25.14.7
Summary:

Wants to make a new musical instrument on the principle of resonance; JH also suggests some improvements in the construction of the organ.

Contributor:
John Herschel Project

Herschel7053

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[12 September 1856]
Source of text:
RS:HS 6.289 & 23.181
Summary:

Thought that AD's last letter was supposed to be written in verse. Hopes his injury will soon improve. Does not recollect any habit of Humphry Davy rubbing his hands together. A professor, [G. J.?] Stoney, has re-invented JH's collimating telescope and not improved it.

Contributor:
John Herschel Project

Herschel7056

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[11 November 1856]
Source of text:
RS:HS 23.183
Summary:

Comments on the state of JH's health, color blindness, missing R.A.S. Notices, and decimal coinage.

Contributor:
John Herschel Project
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