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Herschel (son), John in correspondent 
Herschel, John in author 
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From:
Sir John Herschel
To:
John Herschel (son)
Date:
n.d.
Source of text:
JHS 6.65
Summary:

About changes in metals due to frequent expansions and contractions, and about the health of JH's son William.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[18 August 1857]
Source of text:
JHS 5.6
Summary:

The letter contains financial arrangements with son John while still in England, extensive comments on the fighting and restructuring of the colonial system in India, some matters relating to earth strata, and finally an extended discussion of the 'Cavendish experiment' [for measuring the gravitational attraction between lead balls].

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[7 May 1858]
Source of text:
JHS 5.47
Summary:

The family is waiting to hear from son John; JH comments on the end of the East India Company's rule in India, and on another newspaper item.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[25 May 1860]
Source of text:
JHS 5.3
Summary:

Comments extensively on the calculation, and elimination, of error in geodesic measurements; JH concludes with a few family news items.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[11 September 1860]
Source of text:
JHS 5.4
Summary:

Begins with a discussion of the probability of error in a series of measurements and comments on astronomical observations including the observation of a comet.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[12] January 1861
Source of text:
JHS 5.5
Summary:

Writes to inform son John of the sudden death [after only a very brief illness] of John's sister Margaret Louisa. [The letter is quiet and accepting, praising God for the happy and blameless life that 'Looey' had led and what joy she had brought to the family.]

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[26 June 1862]
Source of text:
JHS 5.7
Summary:

Expresses concern about son John's loneliness in India, and so JH proceeds to tell him of the Great Exhibition of 1862, and about scientific work being done such as improvements in meteorology, solar photography, and the work being done on JH's catalogue of nebulae. No decision has been made about the Edinburgh professorship for which son Alexander has applied.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[1863?]
Source of text:
JHS 5.8b
Summary:

A short note to comment on photographs son John has sent; also inquires about prospects for the India survey John has discussed.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[2?] June 1863
Source of text:
JHS 5.8a
Summary:

Saw J. B. N. Hennessey [who had just come from India] at a Greenwich visitation day, but did not have time to speak to him there. JH will invite him to Collingwood.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[14 July 1863]
Source of text:
JHS 5.9
Summary:

Comments on zero and observational errors when using a telescope, and adds some comments about family relationships and JH's nebula catalogue. [Part of this letter is indecipherable.]

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[1864?]
Source of text:
JHS 5.14
Summary:

About geodesic books and JH's encouragement to John to keep asking questions; indeed JH is almost insistent on son John's writing to JH with questions, book needs, and confidences. JH also talks about finding the arithmetical mean of a number of observations. [Also included is the 1st page of a letter to John from one of his sisters.]

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[16 March 1864]
Source of text:
JHS 5.13
Summary:

Announces son William's engagement to Emma Hardcastle; warns son John against the Anglo-Indian ladies; JH comments at length on a problem in surveying, and concludes with the news that daughter Francisca's health is improving.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[25 May 1864]
Source of text:
JHS 5.11
Summary:

Positively responds to son John's idea of geodesic measurements of much larger than usual triangles; suggests that John is not likely to be able to correct the whole world's English; JH reports about sickness in the family including his own seemingly permanent bronchitis.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[11 September 1864]
Source of text:
JHS 5.10
Summary:

Is pleased with the new wife of son William; JH is very supportive of son John's developing interest in language [an interest of JH's]; JH has not heard of any proposed Himalayan observatory; is sending a copy of his nebula catalogue.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
1864-9-12 or later
Source of text:
JHS 5.12
Summary:

Refers son John to JH's Meteorology for help with the mechanics of dynamic wave curves; encourages John to do good whenever he has the opportunity.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[2] January 1865
Source of text:
JHS 6.59
Summary:

Discusses at length the means of calculating the mean daily rainfall in India, and comments on son John's work in geodesy.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[9 January 1865]
Source of text:
JHS 5.16
Summary:

Works out the derivation for a mathematical problem, and JH suggests that son John should use this derivation in his paper; it is christening day for William, son of John's sister Caroline. [Also included is a one page letter of family news from sister Julia.]

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[1 April 1865]
Source of text:
JHS 6.58
Summary:

Most of the letter is devoted to a mathematical derivation to show that part of son John's work on errors in geodetic observations is in error; however, part is highly praised by JH. Remainder of letter is clearly intended as a morale booster for John.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
[29 October 1865]
Source of text:
JHS 6.57
Summary:

A 'pep talk' from father to son on the occasion of son John's birthday.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Herschel (son)
Date:
5 November [1866]
Source of text:
JHS 5.15
Summary:

Worried by not having heard from son John, especially as there is cholera in India; JH sends news of the family, especially of how bright the younger girls are; also comments on world events and about books sent to John.

Contributor:
John Herschel Project