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Forbes, James David in correspondent 
Herschel, John in author 
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Herschel3545

From:
Sir John Herschel
To:
James David Forbes
Date:
[23 May 1832]
Source of text:
St. Andrews 73 (C: RS:HS 21.110)
Summary:

Sends thanks and congratulations for paper verifying electric origins of all magnetism. Will give JF an actinometer with complete instructions. Includes some instructions for obtaining and using it. Sends regards to Mario Gemellaro, should JF go to Catania.

Contributor:
John Herschel Project

Herschel3591

From:
Sir John Herschel
To:
James David Forbes
Date:
[5 August 1832]
Source of text:
St. Andrews 123 (C: RS:HS 25.3.8)
Summary:

Suggests that JF use his instruments to compare the force of solar radiation at high and low elevations. Delineates possible methods for this experimentation, and lists results of similar experiments. Includes further information on the actinometer.

Contributor:
John Herschel Project

Herschel3413

From:
Sir John Herschel
To:
James David Forbes
Date:
[7 December 1832]
Source of text:
St. Andrews 171 (C: RS:HS 21.124)
Summary:

Gives JF permission to use JH's letter to JF's brother in any way JF sees fit to obtain the Chair of Natural Philosophy (at Edinburgh), but still does not wish directly to promote JF's selection. Briefly discusses results of JF's experiments with the actinometer.

Contributor:
John Herschel Project

Herschel3190

From:
Sir John Herschel
To:
James David Forbes
Date:
[17 December 1832]
Source of text:
St. Andrews 183 (C: RS:HS 21.125)
Summary:

Is drawing up a new actinometer and comments on JF's ideas about it. Encloses a letter to JF's brother.

Contributor:
John Herschel Project

Herschel3592

From:
Sir John Herschel
To:
James David Forbes
Date:
[20 February 1833]
Source of text:
St. Andrews 17 (C: RS:HS 21.129)
Summary:

Congratulates JF on obtaining, after some difficulty, the Chair of Natural Philosophy at Edinburgh. Accepts offer to discuss meteorology with JF's relation Leslie Melville[?], and hopes to mention his actinometer.

Contributor:
John Herschel Project

Herschel3161

From:
Sir John Herschel
To:
James David Forbes
Date:
[6 May 1833]
Source of text:
St. Andrews 28
Summary:

Offers JF advice about the telescope mirror [?] and looks forward to seeing JF on his way to France.

Contributor:
John Herschel Project

Herschel3594

From:
Sir John Herschel
To:
James David Forbes
Date:
[16 October 1833]
Source of text:
St. Andrews 48 (C: RS:HS 21.151)
Summary:

Wishes JF well in [Edinburgh] and leaves addresses where JH may be reached [at the Cape].

Contributor:
John Herschel Project

Herschel3593

From:
Sir John Herschel
To:
James David Forbes
Date:
[30 May 1835]
Source of text:
St. Andrews 16 (C: RS:HS 25.4.11)
Summary:

Discusses reduction of barometric observations. Praises the Cape's climate.

Contributor:
John Herschel Project

Herschel3421

From:
Sir John Herschel
To:
James David Forbes
Date:
[15 November 1836]
Source of text:
St. Andrews 60 (C: RS:HS 21.213)
Summary:

Discusses methods of magnetic observation, JH's actinometric readings in the Cape, and the need for more physical observatories.

Contributor:
John Herschel Project

Herschel3636

From:
Sir John Herschel
To:
James David Forbes
Date:
[25 September 1837]
Source of text:
St. Andrews 40 (C: RS:HS 21.229)
Summary:

Thanks JF for papers and requests copies of those JH has borrowed; comments on JH's observations on solar heat, light, and lines in spectra.

Contributor:
John Herschel Project

Herschel3410

From:
Sir John Herschel
To:
James David Forbes
Date:
[30 March 1839]
Source of text:
St. Andrews 24 (C: RS:HS 22.5)
Summary:

Discusses prospects for meteorological committee of B.A.A.S., on which they both will serve. Lacks time for it. Does not need hourly observations made by Committee of Physico-Mathematical Society of Edinburgh.

Contributor:
John Herschel Project

Herschel3560

From:
Sir John Herschel
To:
James David Forbes
Date:
[6 June 1839]
Source of text:
St. Andrews 32 (C: RS:HS 22.15)
Summary:

Writes 'in haste' to thank JF for a pair of papers. Comments on Louis Daguerre's pictures in Paris.

Contributor:
John Herschel Project

Herschel3521

From:
Sir John Herschel
To:
James David Forbes
Date:
[3 March 1840]
Source of text:
St. Andrews 12 (C: RS:HS 25.6.1 & TxU:H/L-0157; Reel 1054)
Summary:

Outlines theory behind and method for preparing thermographic paper, which allows observers to determine 'what share each ray of the spectrum bears in producing the observed total effects.'

Contributor:
John Herschel Project

Herschel3595

From:
Sir John Herschel
To:
James David Forbes
Date:
[13 March 1840]
Source of text:
St. Andrews 13 (C: RS:HS 22.44)
Summary:

On the preparation of paper to exhibit a thermal spectrum.

Contributor:
John Herschel Project

RS-MM-001100

From:
John Frederick William Herschel
To:
James David Forbes
Date:
4 June 1840
Source of text:
MM/16/137, Royal Society
Summary:

No summary available.

Contributor:
Royal Society

Herschel3131

From:
Sir John Herschel
To:
James David Forbes
Date:
[10 June 1840]
Source of text:
St. Andrews 34 (Adraft: TxU:H/L-0158 & -0145.2; Reel 1054 & C: RS:HS 22.44)
Summary:

R.S.L. will deviate from its intellectual purpose whenever it meddles in practical observations. Proper role for R.S.L. is to suggest goals and methods and to reward discoveries. Recommends discontinuing meteorological observations at Somerset House; other stations now provide better data. If R.S.L. insists on establishing a meteorological register, JH suggests one like that of J. F. Daniell.

Contributor:
John Herschel Project

Herschel3313

From:
Sir John Herschel
To:
James David Forbes
Date:
[10 August 1840]
Source of text:
St. Andrews 42 (C: RS:HS 22.62)
Summary:

Explains efforts at using a makeshift apparatus for 'fixing the spectrum.' Discusses current confusion and ultimate hope surrounding JF's meteorological recommendations. In a postscript, notes observations of meteors in Persei.

Contributor:
John Herschel Project

Herschel3316

From:
Sir John Herschel
To:
James David Forbes
Date:
1842-4-9[?]
Source of text:
St. Andrews 21? (C: RS:HS 22.115)
Summary:

Instructions for preparing liquid for the actinometer. Describes 'very strange' experiments on the spectrum as well as an 'unusual' cloud formation.

Contributor:
John Herschel Project

Herschel3264

From:
Sir John Herschel
To:
James David Forbes
Date:
[1842-5]
Source of text:
St. Andrews 43?
Summary:

Proposes meeting times in town. Suggests that JF observe the upcoming total eclipse astronomically. Agrees with JF's seemingly 'cold &c' circular on scientific partnerships, while regretting that it needed to be written.

Contributor:
John Herschel Project

Herschel3522

From:
Sir John Herschel
To:
James David Forbes
Date:
16?] May [1842
Source of text:
St. Andrews 49
Summary:

Sets up approximate meeting time, depending on his family's timely departure to Antwerp, with JF at the R.S.L. apartments.

Contributor:
John Herschel Project
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