Search: Herschel, John in correspondent 
Airy, George Biddell in correspondent 
1860-1869::1867 in date 
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Showing 1–20 of 21 items

Herschel4916

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[29 January 1867]
Source of text:
RS:HS 1.304 (C: RGO 6.381.448)
Summary:

Thanking him for lecture papers. Has sent his paper on partial differential equations.

Contributor:
John Herschel Project

Herschel275

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[5 May 1867]
Source of text:
RGO 6.122.177
Summary:

Is assisting in communication between G. G. Stokes and GA, about stereoscopic observation of eclipses; JH is not mobile enough to attend the next Board of Visitors meeting.

Contributor:
John Herschel Project

Herschel1603

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[6 May 1867]
Source of text:
Cambridge University Library 7656/A3339
Summary:

Response to a letter from JH to G. G. Stokes [1867-5-5] seen by GA, on the problem of the effect of the telescope on illumination from a light source, especially related to a solar eclipse.

Contributor:
John Herschel Project

Herschel311

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[6 May 1867]
Source of text:
RGO 6.479.162
Summary:

Comments on the use of different telescopes and their effect on the albedo of the sun, related to solar eclipses [see JH's 1867-5-5].

Contributor:
John Herschel Project

Herschel276

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[7 May 1867]
Source of text:
RGO 6.122.175
Summary:

A note with G. G. Stokes' letter, which JH forgot to enclose [see JH's 1867-5-5].

Contributor:
John Herschel Project

Herschel1820

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[8 May 1867]
Source of text:
TxU:H/M-0642 (C: RGO 6.122.179)
Summary:

Returns JH's letter from G. G. Stokes about eclipse spectroscopy; GA has written to Stokes as well and encloses a copy of this letter.

Contributor:
John Herschel Project

Herschel4917

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[14 August 1867]
Source of text:
RS:HS 1.305
Summary:

Regarding earth currents and galvanic registers. Results of recent experiments on these.

Contributor:
John Herschel Project

Herschel158

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[12 September 1867]
Source of text:
RGO 6.695.491
Summary:

Comments on GA's theory of the thermo-electric origin of terrestrial magnetism.

Contributor:
John Herschel Project

Herschel234

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[12 September 1867]
Source of text:
RGO 6.412.244
Summary:

Is very pleased with resolution about the observations of Charles Rümker [see Edward Sabine's 1867-8-30].

Contributor:
John Herschel Project

Herschel575

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[12 September 1867]
Source of text:
RGO 6.359.534
Summary:

It appears that the Indian government has now approved the introduction of the metric system; JH is very upset.

Contributor:
John Herschel Project

Herschel4918

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[14 September 1867]
Source of text:
RS:HS 1.306
Summary:

Thanking him for his paper on Indian Standards and systems of measurement.

Contributor:
John Herschel Project

Herschel4919

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[14 September 1867]
Source of text:
RS:HS 1.307 (C: RGO 6.695.493)
Summary:

Regarding the theory of magnetic currents.

Contributor:
John Herschel Project

Herschel576

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[14 September 1867]
Source of text:
RGO 6.359.535
Summary:

Expresses GA's contempt for those who legislate for others without knowing what they are doing; GA is talking about the Indian legislation [see JH's 1867-9-12].

Contributor:
John Herschel Project

Herschel577

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[3 November 1867]
Source of text:
RGO 6.359.536
Summary:

Writes to inquire as to the exact definition of the gallon and the pound, and the circumstances under which the appropriate measures would be made.

Contributor:
John Herschel Project

Herschel1821

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[4 November 1867]
Source of text:
TxU:H/M-0643.1 (C: RGO 6.359.537)
Summary:

Provides JH with best definition that GA has available for the gallon [see JH's 1867-11-3], noting that methods for establishing standards are revised, even if the standards supposedly are not.

Contributor:
John Herschel Project

Herschel12603

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[29 November 1867]
Source of text:
TxU:H/L-0025; Reel 1054
Summary:

Concerned about 'Commercial weight' of new standard of weights and measures.

Contributor:
John Herschel Project

Herschel1822

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[30 November 1867]
Source of text:
TxU:H/M-0643.2 (C: RGO 6.359.542)
Summary:

Writes to acknowledge receipt of letter [see JH's 1864-11-25], but it will take time to work through JH's calculations carefully.

Contributor:
John Herschel Project

Herschel579

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[2 December 1867]
Source of text:
RGO 6.359.543 (C: TxU:H/L-0026)
Summary:

Is still trying to bring the various definitions of the pound into agreement [see GA's 1867-11-30]; the question of weighing in air or vacuum remains as a problem.

Contributor:
John Herschel Project

Herschel1823

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[3 December 1867]
Source of text:
TxU:H/M-0643.3 (C: RGO 6.359.545)
Summary:

Thanks JH for his useful letter [see JH's 1867-12-2]; it will be of value to the Commission on Weights and Measures.

Contributor:
John Herschel Project

Herschel580

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[3 December 1867]
Source of text:
RGO 6.359.546 (C: TxU:H/L-0027)
Summary:

Having helped to create confusion surrounding the pound weight [see GA's 1867-12-3], JH now understands it simply and clearly; JH wonders if he is 'growing elderly.'

Contributor:
John Herschel Project
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