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Herschel, John in correspondent 
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From:
Charles Babbage
To:
Sir John Herschel
Date:
[6 March 1819]
Source of text:
RS:HS 2.114
Summary:

Has dispatched the tourmaline. His chemical experiments. Circulating functions solving chance problems. [Letter postmarked 1819-3-29.]

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[14 April 1819]
Source of text:
RS:HS 2.115
Summary:

Has received papers from J. B. Biot. Has been to the Customs and Excise. Functional equations.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[8 May 1819]
Source of text:
RS:HS 2.116 (C: RS:HS 20.69 & C inc: TxU:H/L-0051.5; Reel 1054)
Summary:

Answers CB's question on the equation. Hopes to see him in London shortly. Chemical experiments.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[24 July 1819]
Source of text:
RS:HS 2.117
Summary:

Has just returned from Lincolnshire. Will shortly be visiting Torquay. Would like to call on him if convenient. Has heard of a vacant professorship at Edinburgh University and may try for it. Gives an equation of W. H. Wollaston's.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[25 July 1819]
Source of text:
RS:HS 2.118
Summary:

Is going to Edinburgh to apply for the post left vacant by John Playfair's death. Would JH and his father give him certificates and references? [Note by Mrs. CB to the effect that her husband has heard that James Ivory will not be contesting the professorship at Edinburgh].

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
1819-7
Source of text:
RS:HS 2.119 (C: RS:HS 20.72)
Summary:

Wishing CB success in his efforts to obtain the position of professor at Edinburgh. Relates details of his recent experiments with bicarbonate of potash.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[8 August 1819]
Source of text:
RS:HS 2.120
Summary:

Apologizes for the long delay in answering his letter. Relates experiences and hopes of success in his effort to obtain the position of professor at the University.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
1819-[9]
Source of text:
RS:HS 2.121 (C: RS:HS 20.73)
Summary:

Sorry to hear of his failure at Edinburgh. Inviting him to Slough. Enquiring about the people CB met at Edinburgh.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[13 October 1819]
Source of text:
RS:HS 2.122
Summary:

Has just returned from Edinburgh and found JH's letter awaiting him. Relates various experiences in Edinburgh. Recent discoveries in his chemical experiments.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[13 October 1819]
Source of text:
RS:HS 2.123 (C: RS:HS 20.75)
Summary:

Will not be in town until Tuesday afternoon. Has been speculating on a means of telegraphic communication between himself and CB.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[1819?]
Source of text:
RS:HS 2.340
Summary:

Would he like to come for a trip down the river to see W. E. Parry's Expedition ships? Query regarding quartz crystals. Date for Pearsonian dinner.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[1819?]
Source of text:
RS:HS 2.362 (C: RS:HS 20.67)
Summary:

Cannot accompany CB to Deptford because JH busy with James South. Mentions the 'Pearsonian dinner,' 'plagi[h]edral' crystals, and a letter by Wilhelm Olbers.

Contributor:
John Herschel Project
From:
Jean Baptiste Biot
To:
Sir John Herschel
Date:
[2 May 1819]
Source of text:
RS:HS 4.84
Summary:

Has been very busy; otherwise he would have answered his friendly letter earlier. Observations on tourmaline. Double refraction.

Contributor:
John Herschel Project
From:
Jean Baptiste Biot
To:
Sir John Herschel
Date:
[21 October 1819]
Source of text:
RS:HS 4.85
Summary:

Queries regarding the refraction of light in crystals.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Jean Baptiste Biot
Date:
[10 December 1819]
Source of text:
RS:HS 4.86 (C: 20.78)
Summary:

Answers to JB's queries on the refraction of light through crystals, and Newton's rings.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
David Brewster
Date:
[11 January 1819]
Source of text:
RS:HS 20.63
Summary:

Note to accompany the sending of some papers; JH is off to Paris.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
David Brewster
Date:
[15 May 1819]
Source of text:
RS:HS 20.70
Summary:

Some additions to an article submitted about hyposulfurous acid; comments on work by J. B. Biot on polarization and double refraction of crystals.

Contributor:
John Herschel Project
From:
David Brewster
To:
Sir John Herschel
Date:
[14 July 1819]
Source of text:
RS:HS 4.244
Summary:

Is anxious to receive his article on hyposulfurous acid as the volume is almost ready for the printer.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
David Brewster
Date:
[14 July 1819]
Source of text:
RS:HS 20.71 (C: TxU:H/L-0111; Reel 1054)
Summary:

Sends a paper on mother of pearl; apologizes for confused state of paper on hyposulfurous acid.

Contributor:
John Herschel Project
From:
David Brewster
To:
Sir John Herschel
Date:
[22 August 1819]
Source of text:
RS:HS 4.245
Summary:

Has heard from Charles Babbage that JH has sent him the article on hyposulfurous acid, but he has not in fact received it. Has seen Babbage a lot recently. Candidates for the Mathematical chair. Regarding colored rings in Carbonate of Potash. Has reserved his paper on Series for number 3.

Contributor:
John Herschel Project