Search: Herschel, John in correspondent 
Forbes, James David in correspondent 
1840-1849::1842 in date 
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Herschel3598

From:
James David Forbes
To:
Sir John Herschel
Date:
[12 January 1842]
Source of text:
St. Andrews LB III, 318-19 (C: RS:HS 7.299)
Summary:

Is grateful for JH's letter and commendation regarding application for a government pension; will endeavor to carry out his recommendations.

Contributor:
John Herschel Project

Herschel9564

From:
James David Forbes
To:
Sir John Herschel
Date:
[6 April 1842]
Source of text:
RS:HS 7.301
Summary:

Would like to know the composition of the fluid in JH's actinometers.

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

Herschel9565

From:
James David Forbes
To:
Sir John Herschel
Date:
[12 May 1842]
Source of text:
RS:HS 7.302
Summary:

Would like to see him for a few minutes to discuss a paper he is preparing for the R.S.L. on actinometer observations.

Contributor:
John Herschel Project

Herschel9566

From:
James David Forbes
To:
Sir John Herschel
Date:
[14 May 1842]
Source of text:
RS:HS 7.303
Summary:

No meeting of the R.S.L. on the 19th but could arrange to see him before dinner. Hopes to spend the summer amongst the glaciers.

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

Herschel3243

From:
Sir John Herschel
To:
James David Forbes
Date:
[2 June 1842]
Source of text:
St. Andrews 55 (C: RS:HS 22.122)
Summary:

Compares actinometric measurements of radiation. Explains interest in total eclipse relative to actinometry. Discusses the possibility of making actinometric measurements by photographic means.

Contributor:
John Herschel Project

Herschel12742

From:
Sir John Herschel
To:
James David Forbes
Date:
[15 November 1842]
Source of text:
RS:HS 25.6.15 (C: TxU:H/L-0159; Reel 1054)
Summary:

Received JF's paper on 'thermographic process.' Believes that thermic rays were responsible for experimental results of JF, J. W. Draper, and Ludwig Moser. JH's theory of and experiments with thermic rays, which are different from 'calorific' and visible rays, in solar spectrum.

Contributor:
John Herschel Project
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