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Herschel, John in correspondent 
1840-1849::1840 in date 
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Herschel3766

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[10 August 1840]
Source of text:
TxU:H/L-0585.7; Reel 1058
Summary:

JH has given away his sweeping telescope to [Johann] Hausmann and the 5-ft. Newtonian reflector to the R.A.S. to be preserved 'long after I and all the little ones are dead and gone.' The skies have been excellent for JH to observe variable stars and to connect the northern with the southern magnitudes. Proved that Alpha Orionis is both a variable star and a periodical star.

Contributor:
John Herschel Project

Herschel3767

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[5 November 1840]
Source of text:
TxU:H/L-0585.14; Reel 1058
Summary:

JH and family are beginning to feel at home at Collingwood.

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

Herschel3805

From:
Sir John Herschel
To:
Robert Hunt
Date:
[10 November 1840]
Source of text:
George Eastman House, 4.17 (C: RS:HS 22.70)
Summary:

Does not know anywhere that such processes as RH uses are used for registry work, although the idea is frequently raised.

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

Herschel3990

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
1840-8
Source of text:
TxU:H/L-0585.8.a; Reel 1058
Summary:

Reports that there is no bust of William Herschel at the R.S.L., as JH once believed.

Contributor:
John Herschel Project

Herschel4034

From:
Sir John Herschel
To:
Robert Hunt
Date:
5] April [1840
Source of text:
George Eastman House, 2.17
Summary:

Hopes that his paper does not anticipate any of RH's work; will share with the R.S.L. any of RH's results. Laments that he is unable to fix the spectral colors on photographic paper. Asks if RH has studied the bromines.

Contributor:
John Herschel Project

Herschel4168

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[16 March 1840]
Source of text:
Cape Archives/Maclear Papers File 100
Summary:

Four appointed directors sent to Cape schools. Will leave Slough in two weeks for Collingwood. Laid William Herschel's telescope to rest at Slough.

Contributor:
John Herschel Project

Herschel4293

From:
Sir John Herschel
To:
Andries Stockenström
Date:
[17 August 1840]
Source of text:
RS:HS 17.25 (C: 22.66)
Summary:

Congratulates AS on AS being made baronet; wishes him well on re-joining his family at the Cape. Hopes that the problems between AS and Governor George Napier were due only to 'incompatibility of positions.'

Contributor:
John Herschel Project

Herschel4388

From:
Sir John Herschel
To:
John Phillips
Date:
[17 December 1840]
Source of text:
RS:HS 22.73
Summary:

Requests JP send JH's projected barometer observation to W. R. Birt.

Contributor:
John Herschel Project

Herschel4397

From:
Sir John Herschel
To:
John Taylor, F.R.S.
Date:
[17 January 1840]
Source of text:
RS:HS 17.427b (C: RS:HS 22.37)
Summary:

Requests aid in obtaining materials for experiments, including metal ores.

Contributor:
John Herschel Project

Herschel523

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[29 July 1840]
Source of text:
RGO 6.340.281
Summary:

Responds to GA's circulated material for the Standards Commission; suggests time to digest the information.

Contributor:
John Herschel Project

Herschel524

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[30 October 1840]
Source of text:
RGO 6.340.284
Summary:

Is sending comments on GA's proposals [see GA's 1840-10-13]; JH has been asked about obtaining a heliometer from Munich; seeks GA's opinion on the quality of the brass workmanship in Munich.

Contributor:
John Herschel Project

Herschel525

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[30 October 1840]
Source of text:
RGO 6.340.286
Summary:

Provides detailed comments on GA's circulated material on standards [see JH's 1840-10-30]; tends toward maintaining basic units but finding decimal relationships between them.

Contributor:
John Herschel Project

Herschel5348

From:
Sir John Herschel
To:
Charles Babbage
Date:
[10 January 1840]
Source of text:
RS:HS 2.295
Summary:

Regarding communications from Paddington. Gives verses written in honor of the 40-foot telescope. Has some strange results in photographic work.

Contributor:
John Herschel Project

Herschel6046

From:
Sir John Herschel
To:
Francis Baily
Date:
[4 January 1840]
Source of text:
RS:HS 3.172 (C: RS:HS 25.8.25)
Summary:

Will be pleased to avail himself of the offer of a bed when the council meets. Will prepare a paper on Alpha Orionis for the Friday meeting. Can FB give him any ideas for the Anniversary address?

Contributor:
John Herschel Project

Herschel6050

From:
Sir John Herschel
To:
Francis Baily
Date:
[9 February 1840]
Source of text:
RS:HS 22.42
Summary:

Will attend R.A.S council and stay with FB; question of expulsion of three members.

Contributor:
John Herschel Project
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