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From:
George Biddell Airy
To:
Sir John Herschel
Date:
[13 July 1843]
Source of text:
TxU:H/M-0629.4 (C: RGO 6.368.667)
Summary:

Provides JH with the measurements from a series of observations of Gamma Virginis.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Unidentified
Date:
[18 July 1843]
Source of text:
DMC 695A.885.28
Summary:

Refers to a variety of salts and their reaction to light in the production of photographs. JH hopes that [?] still intends to publish his work in this area.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
[28 July 1843]
Source of text:
RS:HS 15.153
Summary:

Will undertake magnetic report except parts for which research is not yet completed. Needs [Johann] Lamont's recommendation regarding experiments. Sends [James] Ross's observations for perusal.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
George Biddell Airy
Date:
[18 July 1843]
Source of text:
RGO 6.193.203
Summary:

Finds GA's measurements of Gamma Virginis far away from JH's own, and instructs GA in the best way to measure double star positions.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Smyth
Date:
[18 July 1843]
Source of text:
RS:HS 22.163
Summary:

Devises and suggests mode of micrometric measurement of angles.

Contributor:
John Herschel Project
From:
William Henry Smyth
To:
Sir John Herschel
Date:
[11 July 1843]
Source of text:
RS:HS 16.272
Summary:

Pleased with JH's Gamma Virginis results. Mr. Visconti made head of Military Geographical Institute at Naples.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Smyth
Date:
[9 July 1843]
Source of text:
RS:HS 22.161
Summary:

Sends calculations of Gamma Virginis and determines its eccentricity. Believes the orbit is highly elongated, like that of a comet.

Contributor:
John Herschel Project
From:
William Henry Smyth
To:
Sir John Herschel
Date:
[2 July 1843]
Source of text:
RS:HS 16.271
Summary:

Agrees with JH opinions of Gamma Virginis orbit. Sends JH a drawing by C. P. Smyth of Halley's Comet.

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[20 July 1843]
Source of text:
RS:HS 1.126 (C: RGO 6.193.205)
Summary:

Regarding the measurement of angles. Observations on a problem set by JH.

Contributor:
John Herschel Project
From:
William Radcliffe Birt
To:
Sir John Herschel
Date:
[20 July 1843]
Source of text:
RS:HS 4.102
Summary:

Since he forwarded the parcel he has changed his address.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Francis Baily
Date:
[4 July 1843]
Source of text:
RS:HS 3.251 (C: RS:HS 25.8.56)
Summary:

Has received the maps. Gives F. W. Bessel's views on the re-arrangement of the constellations which has been proposed. Comments on FB's memorandum.

Contributor:
John Herschel Project
From:
Francis Baily
To:
Sir John Herschel
Date:
[22 July 1843]
Source of text:
RS:HS 3.252
Summary:

Is returning the report to the B.A.A.S., with one alteration. Will forward the map to Mr. Jensen with JH's remarks.

Contributor:
John Herschel Project
From:
Francis Baily
To:
Sir John Herschel
Date:
[24 July 1843]
Source of text:
RS:HS 3.253
Summary:

Will be unable to attend the meeting of the B.A.A.S. His sister is having an operation to her eyes. Is sending an account of the comet. Mr. Jensen will be coming down with the map.

Contributor:
John Herschel Project
From:
Francis Baily
To:
Sir John Herschel
Date:
[25 July 1843]
Source of text:
RS:HS 3.254
Summary:

Mr. Jensen called to say that he will be visiting Collingwood on Monday with the map.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Joshua Cooper
Date:
[18 July 1843]
Source of text:
RS:HS 22.162
Summary:

Comments on calculation of orbit of Gamma Virginis; requests any observations EC has of that star.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
[William Radcliffe Birt]
Date:
[20 July 1843]
Source of text:
RS:HS 19.103
Summary:

Received copies of barometer observations. Searching for original data (lists stations) that JH sent to WB. Invites additions to JH's report. Please send account of expenses.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Radcliffe Birt
Date:
[21 July 1843]
Source of text:
RS:HS 19.104
Summary:

Yesterday's letter was mistakenly sent to WB's former address. Sends copy.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Radcliffe Birt
Date:
[28 July 1843]
Source of text:
RS:HS 19.106 (C: 19.105, 22.166, & 22.167)
Summary:

JH's theory of barometric waves. Comparison with ocean tides. Non-trade winds follow laws of periodicity and are predictable, accounting for previously unexplained phenomena. Attributes rotating storms to interference of two or more wave trains. Will propose WB as director of new B.A.A.S. project to discover laws of weather behavior. Sends payment for WB's expenses. Never saw anything more beautiful than WB's 'Symmetrical Barometric Curve.'

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Parsons (Lord Rosse)
Date:
[17 July 1843]
Source of text:
Rosse Papers K2.1
Summary:

Declines WP's invitation to attend Cork B.A.A.S. meeting and afterwards to visit WP and to see his reflecting telescopes. Informs WP that [C. A. von] Steinheil had written JH about a process of 'Electro-gilding' mirrors for telescopes.

Contributor:
John Herschel Project
From:
Charles Few
To:
Sir John Herschel
Date:
[26 July 1843]
Source of text:
RS:HS 7.209
Summary:

Regarding a nuisance created at Slough by a steam engine.

Contributor:
John Herschel Project