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Herschel2809

From:
Edward Sabine
To:
Sir John Herschel
Date:
[1 May 1840]
Source of text:
RS:HS 15.89
Summary:

R.S.L. Council approved publication of ES's paper on magnetic observation at sea. Discussions for North American magnetic observatories continue.

Contributor:
John Herschel Project

Herschel2810

From:
Edward Sabine
To:
Sir John Herschel
Date:
[19 May 1840]
Source of text:
RS:HS 15.90
Summary:

Hopes to meet with JH to discuss some data. Announces that at the Newcastle B.A.A.S. meeting, JH, Humphrey Lloyd, and ES were appointed to a subcommittee. Discusses what James Ross will do on his return from the Cape. Announces the possibility of ten new observatories in Russia.

Contributor:
John Herschel Project

Herschel2811

From:
Edward Sabine
To:
Sir John Herschel
Date:
[26 May 1840]
Source of text:
RS:HS 15.91
Summary:

Relays communications from [Charles] Riddell in Toronto, who is making progress on the observatory there and has selected an officer of the artillery for an assistant. Suggests the meeting of the Physical Committee be moved. Discusses other matters of various observatories.

Contributor:
John Herschel Project

Herschel2812

From:
Edward Sabine
To:
Sir John Herschel
Date:
[27 May 1840]
Source of text:
RS:HS 15.92
Summary:

Encloses a letter from Boston, which may host an observatory. Has sent Boston information.

Contributor:
John Herschel Project

Herschel2813

From:
Edward Sabine
To:
Sir John Herschel
Date:
[29 May 1840]
Source of text:
RS:HS 15.93
Summary:

Encloses a letter from [John] Lefroy about an 'outbreak of [solar] spots' observed at a certain time. Speaks of purchasing instruments and of writing to the secretary of the Amer[ican Philosophical?] Society.

Contributor:
John Herschel Project

Herschel3018

From:
Wilhelm Struve
To:
Sir John Herschel
Date:
[28 May 1840]
Source of text:
RS:HS 17.128
Summary:

Rejoices at welcome JH received on returning to England from the Cape. Excellent resources at his disposal at Pulkowa. Mentions coin, commemorating opening of the observatory, sent to JH by means of [H. C.] Schumacher. Refers to [Otto] Struve's work on double stars. Lauds capacity of large refractor at Pulkowa Observatory.

Contributor:
John Herschel Project

Herschel3402

From:
Sir John Herschel
To:
[R.S.L. Council]
Date:
[21 May 1840]
Source of text:
RS RR.1.188
Summary:

Formally reports on paper by Baden Powell on theory of dark bands found in solar spectrum. G. B. Airy agrees with JH's report.

Contributor:
John Herschel Project

Herschel3527

From:
Sir John Herschel
To:
[John William Lubbock]
Date:
[31 May 1840]
Source of text:
RS LUB.H.356a
Summary:

Will be unable to attend Council meeting, but comments on issue to be discussed of whether R.S.L. should do anything respecting observatory at Hammerfest (North Cape).

Contributor:
John Herschel Project

Herschel378

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[16 May 1840]
Source of text:
RGO 6.463.70
Summary:

Has a problem with the explanation of interference bands produced by mica being placed between the eye and prism-produced dispersion; the explanation is Baden Powell's.

Contributor:
John Herschel Project

Herschel379

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[1840-5-16 or later]
Source of text:
RGO 6.463.76
Summary:

Writes to supply GA with an address for a reply to JH's 1840-5-16.

Contributor:
John Herschel Project

Herschel380

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[18 May 1840]
Source of text:
RGO 6.463.77
Summary:

Responds to JH [see JH's 1840-5-16 or later] indicating to what address GA had sent his reply [see GA's 1840-5-17].

Contributor:
John Herschel Project

Herschel381

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[19 May 1840]
Source of text:
RGO 6.463.78
Summary:

Thanks GA for the time and trouble GA took in writing about interference bands [see GA's 1840-5-17]; JH's wife, Margaret, is making many visits to the dentist.

Contributor:
John Herschel Project

Herschel382

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[1840-5-20 or later]
Source of text:
RGO 6.463.81
Summary:

A note agreeing with GA about prism interference [see GA's 1840-5-20].

Contributor:
John Herschel Project

Herschel3946

From:
Sir John Herschel
To:
Robert Hunt
Date:
[12 May 1840]
Source of text:
George Eastman House, 3.17 (C: RS:HS 22.15)
Summary:

Will forward RH's paper to the R.S.L.; intrigued by RH's results using mercury vapor to produce the image on exposed paper.

Contributor:
John Herschel Project

Herschel4697

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[17 May 1840]
Source of text:
RS:HS 1.86 (C: RGO 6.463.72)
Summary:

Regarding Prof. Baden Powell's paper on dark bands. Is making catalogues of the moveables of the observatory.

Contributor:
John Herschel Project

Herschel4698

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[20 May 1840]
Source of text:
RS:HS 1.87 (C: RGO 6.463.80)
Summary:

Concerning prism refraction.

Contributor:
John Herschel Project

Herschel6057

From:
Sir John Herschel
To:
Francis Baily
Date:
[6 May 1840]
Source of text:
RS:HS 3.182 (C: RS:HS 25.8.27)
Summary:

Would FB deputize for him at the council meeting on Friday as he is unable to attend. Letter from F. W. Bessel regarding 61 Cygni. Has written to G. B. Airy regarding Thomas Maclear's paper.

Contributor:
John Herschel Project

Herschel8272

From:
Sir John Herschel
To:
Elizabeth Drummond [Sr.]
Date:
[12 May 1840]
Source of text:
RS:HS 19.78
Summary:

Just moved [to Collingwood]. Will send information about ED's late son, Thomas Drummond. Recalls Drummond's fame and triangulation work on Irish Survey. Describes invention and first demonstration of Drummond Light.

Contributor:
John Herschel Project

Herschel8273

From:
Sir John Herschel
To:
William Radcliffe Birt
Date:
[22 May 1840]
Source of text:
RS:HS 19.79-80 (C: RS:HS 22.52)
Summary:

How to reduce barometer observations and project them in curves. R.S.L. will provide table by H. C. Schumacher for this purpose. How to obtain 'law of decimal oscillations' for each station. WB's name will be affixed to results. JH needs receipt for observations, which belong to South African Literary and Philosophical Society.

Contributor:
John Herschel Project

Herschel8828

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[3 May 1840]
Source of text:
Science Museum Talbt 1/25
Summary:

Thanks for excellent pictures WT sent. JH wishes JH had time for further experiments, especially on the 'thermic spectrum.' Praises [Robert] Hunt's results. Recommends experiment to WT.

Contributor:
John Herschel Project
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