Search: Herschel, John in author 
1860-1869::1869 in date 
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Herschel13559

From:
Sir John Herschel
To:
Thomas Warner
Date:
[7 July 1869]
Source of text:
'Preface to Improved Edition' of Thomas Warner, How To Keep the Clock Right (187
Summary:

Received TW's book and approves simplicity and economy of its method of keeping time by using small fixed telescope to reduce star observations. Disapproves of using 'Dominical Letters.' Suggests using Julian dates.

Contributor:
John Herschel Project

Herschel14089

From:
Sir John Herschel
To:
Unidentified
Date:
[27 June 1869]
Source of text:
TxU:H/M-0306.2 & TxU:H/M-0307.2; Reel 1087
Summary:

Develops mathematical theorem.

Contributor:
John Herschel Project

Herschel1458

From:
Sir John Herschel
To:
George Gabriel Stokes
Date:
[11 January 1869]
Source of text:
Cambridge University Library 7656/H723
Summary:

Requests sending of a copy of recent R.S.L. Proceedings to JH's son in India.

Contributor:
John Herschel Project

Herschel1460

From:
Sir John Herschel
To:
George Gabriel Stokes
Date:
[18 July 1869]
Source of text:
Cambridge University Library 7656/H724
Summary:

Note to accompany an extract from JH's son John's letter, reporting on his observations of solar prominences.

Contributor:
John Herschel Project

Herschel1463

From:
Sir John Herschel
To:
George Gabriel Stokes
Date:
[3 September 1869]
Source of text:
Cambridge University Library 7656/H725
Summary:

Agrees with GS's clarification of 'continuous spectra' and other terms [see GS's 1869-9-2]. Includes a copy of part of a letter from John Herschel [JH's son] about solar prominences.

Contributor:
John Herschel Project

Herschel14762

From:
Sir John Herschel
To:
the London Times
Date:
30 August [1869]
Source of text:
TxU:H/M-0950.2; Reel 1083
Summary:

Discusses in detail the then currently debated issue of a 'mintcharge or seigniorage' on gold coinage. Also discusses the idea of an international coinage.

Contributor:
John Herschel Project

Herschel159

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[8 May 1869]
Source of text:
RGO 6.695.494 (drafts RS:HS 1.314 & 24.256)
Summary:

Has read the syllabus of GA's lectures on magnetism; it reminds JH of his attempt to solve the problem of 'Mahomet's coffin', which JH still believes would work.

Contributor:
John Herschel Project

Herschel166

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[30 May 1869]
Source of text:
RGO 6.257.356
Summary:

Is considering a new edition of Outlines Astr.[?] and wants to provide the latest determinations of the periods of rotation of the planets.

Contributor:
John Herschel Project

Herschel18

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[13 January 1869]
Source of text:
RGO 6.381.451
Summary:

Has received GA's paper on spectral lines and is amazed that it is possible to see a spectrum in the light from faint nebulae.

Contributor:
John Herschel Project

Herschel1934

From:
Sir John Herschel
To:
[John Tyndall]
Date:
[29 May 1869]
Source of text:
DMC 695A.885.11 (C: RS:HS 24.263 & RI 561)
Summary:

'Great Comet of 1843' presents difficulties for JT's explanation of comets' tails [continuation of JH's 1869-5-28].

Contributor:
John Herschel Project

Herschel2046

From:
Sir John Herschel
To:
Eliza Susan Quincy
Date:
[18 October 1869]
Source of text:
RS:HS 14.289 (C: RS:HS 24.286)
Summary:

Thanks EQ for report of [Alexander von] Humboldt's centenary and the photographs from Henry Morton [see EQ's 1869-9-26]. Discusses neglect of James Grahame's work in England.

Contributor:
John Herschel Project

Herschel2182

From:
Sir John Herschel
To:
Henry Enfield Roscoe
Date:
[28 May 1869]
Source of text:
RS:HS 24.261
Summary:

Thanks HR for sending HR's book on spectrum analysis [Spectrum Analysis, 1869]. Praises that publication.

Contributor:
John Herschel Project

Herschel2550

From:
Sir John Herschel
To:
Adam Sedgwick
Date:
[16 June 1869]
Source of text:
RS:HS 15.459 (C: RS:HS 24.269)
Summary:

Praises AS for commencing his fifty-second course of lectures at age 84. Laments his own frailty. Recommends an array of meteorological books . Lists 'useful' meteorological instruments. Mentions family matters.

Contributor:
John Herschel Project

Herschel2612

From:
Sir John Herschel
To:
William Selwyn
Date:
[23 October 1869]
Source of text:
RS:HS 24.288
Summary:

Is working on a compilation of the measures of double stars. If [Rudolf] Wolf's period of 11.11 years is correct, why should 1810-11, a minimum, mark the first observations of solar spots?

Contributor:
John Herschel Project

Herschel2614

From:
Sir John Herschel
To:
William Selwyn
Date:
1869-10
Source of text:
RS:HS 24.289
Summary:

Sends [William Whewell's] 'Isle of Sirens' and an acknowledgement to it in 'skimble skamble Hexameters.' Is eager to receive solar photographs and will send others by Professor [George?] Morton.

Contributor:
John Herschel Project

Herschel2615

From:
Sir John Herschel
To:
William Selwyn
Date:
[1869-11?]
Source of text:
RS:HS 15.514
Summary:

Discusses discrepencies between his observations for September and WS's photograph. It seems the new spots result from Jupiter being in opposition.

Contributor:
John Herschel Project

Herschel2616

From:
Sir John Herschel
To:
William Selwyn
Date:
[3 November 1869]
Source of text:
RS:HS 24.292
Summary:

Describes the similarities between JH's sketches and WS's photographs of sunspots. Has greater faith in own observations. Wishes WS would add Julian dates. Sends Professor [George?] Morton's photographs.

Contributor:
John Herschel Project

Herschel2685

From:
Sir John Herschel
To:
Mary Somerville
Date:
[30 July 1869]
Source of text:
RS:HS 24:275
Summary:

Attached comments [not included] convey JH's views on MS's new manuscript [On Molecular and Microscopical Science, 1869]. Expresses reservations about MS's endorsement of current ideas of forces and their correlation and conservation.

Contributor:
John Herschel Project

Herschel2985

From:
Sir John Herschel
To:
Adolphe Quetelet
Date:
[18 August 1869]
Source of text:
Académie belgique: #53
Summary:

Thanks for second volume of Physique sociale. Happy to see AQ refuting 'the results of statistics of life, accident, crime...[as] indicative of an absence of free agency in human beings and the presence of some sort of impelling necessity.' Mentions JH's daughter's marriage and her learning Chinese.

Contributor:
John Herschel Project

Herschel2986

From:
Sir John Herschel
To:
Adolphe Quetelet
Date:
[14? January 1869]
Source of text:
Académie belgique: #55
Summary:

Was going to write in French, but switched languages. Honored by AQ's insertion of JH's review of AQ's Physique sociale as introduction. Has been very ill and has no strength for attention to anything beyond bodily sufferings. Lists works received.

Contributor:
John Herschel Project
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