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1830-1839::1839 in date 
Herschel, John in author 
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Herschel8696

From:
Sir John Herschel
To:
Heinrich Christian Schumacher
Date:
[7 February 1839]
Source of text:
NSUB Cod.Ms.Gauss 110
Summary:

Sends HS's observations of magnetic declination and dip near London for forwarding to Carl F. Gauss. Encloses a letter from Edward Sabine.

Contributor:
John Herschel Project

Herschel1338

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[9 February 1839]
Source of text:
RS:HS 17.281b (C: RS:HS 22.2)
Summary:

Considerable comment on procedure for submitting paper to R.S.L. Urges WT to mention JH's method of washing with hyposulfite. Comments on some photographic experiments of WT.

Contributor:
John Herschel Project

Herschel8814

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[10 February 1839]
Source of text:
Science Museum Talbt 1/12 (draft 'much altered': RS:HS 17.281b & C: RS:HS 22.2
Summary:

JH welcomes WT's mentioning JH's method of fixing with hyposulfite. JH has put some of JH's images on display at R.S.L. Mentions JH's recent experiments relating to photography. Comments regarding a paper submitted to R.S.L. by WT and on some experiments of WT.

Contributor:
John Herschel Project

Herschel8815

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[12 February 1839]
Source of text:
Science Museum Talbt 1/13 (ACCS: RS:HS 25.5.12 & C: TxU:H/L-0474; Reel 1055)
Summary:

JH will as WT requests stop mentioning JH's hyposulfite fixing process and await publication of WT's process. Reports in detail on some of JH's experiments relating to photography and to spectrum analysis. [In a P.S. dated 1839-2-13,] JH states: 'I have discovered your secret of fixing [or its] equivalent.'

Contributor:
John Herschel Project

Herschel3861

From:
Sir John Herschel
To:
William Rowan Hamilton
Date:
[13 February 1839]
Source of text:
unknown
Summary:

In reply to WH's 1839-2-8 inquiry, JH believes that 'Skotodynamics' (the propagation of light waves) is a new line of research. Caroline Herschel is ecstatic about her Royal Irish Academy medal.

Contributor:
John Herschel Project

Herschel8644

From:
Sir John Herschel
To:
William Swainson
Date:
[14 February 1839]
Source of text:
Linnaean Society
Summary:

Thanks WS for his pamphlet on the 'Statistical Zoology of Britain.' Comments on the dynamics of animal and plant ecology.

Contributor:
John Herschel Project

Herschel6026

From:
Sir John Herschel
To:
Francis Baily
Date:
[15 February 1839]
Source of text:
RS:HS 3.151 (C: RS:HS 25.8.16)
Summary:

Approves of the arrangements made by FB regarding the loan of the theodolite.

Contributor:
John Herschel Project

Herschel9103

From:
Sir John Herschel
To:
William Whewell
Date:
22 February [1839]
Source of text:
TC, Camb. Add. Ms.a.20736 (C: RS:HS 22.3)
Summary:

Requests WW and George Peacock to judge the appropriateness of expending B.A.A.S. funds for some instruments for the Breslau Magnetic Observatory. Mentions other matters relating to the meteorology committee.

Contributor:
John Herschel Project

Herschel6028

From:
Sir John Herschel
To:
Francis Baily
Date:
[26 February 1839]
Source of text:
RS:HS 3.153 (C: RS:HS 25.8.17)
Summary:

Will come up to town so that they can work on Thomas Maclear's four foot scale standard. News of the Glasgow Observatory.

Contributor:
John Herschel Project

Herschel55

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[27 February 1839]
Source of text:
RGO 6.368.620
Summary:

Thanks GA for all his efforts on Thomas Maclear's behalf [see GA's 1839-2-25]; comments on some developments in photography, including the work of Nicephore Niepce done in approximately 1826.

Contributor:
John Herschel Project

Herschel8816

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[28 February 1839]
Source of text:
Buckland, Talbot, 49 inc
Summary:

Invites WT to mention JH's hyposulfite process to J. B. Biot. Recounts JH's recent experiments.

Contributor:
John Herschel Project

Herschel3764

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[1 March 1839]
Source of text:
TxU:H/L-0584.1; Reel 1058
Summary:

Prepared to send to CH copies of the Index to John Flamsteed.

Contributor:
John Herschel Project

Herschel9240

From:
Sir John Herschel
To:
Edward C. Herrick
Date:
[1 March 1839]
Source of text:
Yale Univ.
Summary:

Has sent on one of EH's two letters to Cape Town. Reports on meteor showers, especially meteors seen on 14 Nov. 1837. P.S. adds that JH has received a number of papers by EH.

Contributor:
John Herschel Project

Herschel9104

From:
Sir John Herschel
To:
William Whewell
Date:
[1839-3]
Source of text:
TC, Camb. Add. Ms.a.20737 (C: RS:HS 22.41)
Summary:

Asks WW to approve cost of report forms to be sent to the Breslau Observatory. Has heard that WW's book is nearing completion and contains 'heresy.' Has just submitted a paper on 'photographical matters' to the R.S.L.

Contributor:
John Herschel Project

Herschel13061

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[3 March 1839]
Source of text:
TxU:H/L-0475; Reel 1055
Summary:

Sent WT's specimens to J. B. Biot and F. J. D. Arago in Paris. Developed paper sensitive to heat rays of sun 'beyond the spectrum.' Diagram of three spectra: 'luminous, chemical, and thermic.'

Contributor:
John Herschel Project

Herschel1162

From:
Sir John Herschel
To:
Humphrey Lloyd
Date:
1839-3-[15 or earlie
Source of text:
RS:HS 25.14.20
Summary:

Passes on the suggestion, from G. B. Airy, of the use of copper rings for damping the movements of measuring instruments in measuring terrestrial magnetism.

Contributor:
John Herschel Project

Herschel14846

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[18 March 1839]
Source of text:
NMPFT 1937-4840
Summary:

Thanks for specimen of light sensitive paper. Provides hint on the chemical process that Louis Daguerre may have used in his photographic work. Sends specimens of JH's own work.

Contributor:
John Herschel Project

Herschel9105

From:
Sir John Herschel
To:
William Whewell
Date:
20] March [1839
Source of text:
TC, Camb. Add. Ms.a.20738 (C: RS:HS 22.20)
Summary:

Informs WW about various matters relating to James Ross's expedition. Is considering purchasing a house in Kent.

Contributor:
John Herschel Project

Herschel13015

From:
Sir John Herschel
To:
James Calder Stewart
Date:
[23 March 1839]
Source of text:
TxU:H/L-0428; Reel 1055
Summary:

[Richard] Jones's view is correct. Will wait to hear what Mr. [Meade?] has to say, before JH writes to Mr. Hodges.

Contributor:
John Herschel Project

Herschel8597

From:
Sir John Herschel
To:
Johann Franz Encke
Date:
[24 March 1839]
Source of text:
AdWDDR Encke 49
Summary:

Asks JE to express JH's gratitude to the Royal Academy of Berlin for electing JH a foreign member. Discusses JE's observations of divisions in the ring of Saturn, JH's sightings of Saturn's satellites, the British Antarctic expedition, and comets.

Contributor:
John Herschel Project
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