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From:
Edward Sabine
To:
Sir John Herschel
Date:
[18 June 1840]
Source of text:
RS MM.16.139
Summary:

Discusses difficulties with establishing public magnetical and meteorological observatory. Mentions other business.

Contributor:
John Herschel Project
From:
John Frederick William Herschel
To:
John Herschel
Date:
18 June 1840
Source of text:
MM/16/140, Royal Society
Summary:

No summary available.

Contributor:
Royal Society
From:
John Frederick William Herschel
To:
Edward Sabine
Date:
18 June 1840
Source of text:
MM/16/139, Royal Society
Summary:

No summary available.

Contributor:
Royal Society
From:
John David Roberton
To:
Sir John Herschel
Date:
[18 June 1840]
Source of text:
RS MM.16.140
Summary:

If JH wishes, will continue barometric [?] observations at Royal Society Apartments, which observations JH had requested while at Cape.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
19 June [1840]
Source of text:
RS:HS 15.326
Summary:

[Charles] Riddell's observations suggest Europe and North America experience magnetic disturbances at similar times, but in opposite directions. Suggests course of action for [Charles] Riddell and Lieutenant Younghusband in North America.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[19 June 1840]
Source of text:
Science Museum Talbt 1/26
Summary:

Praises various photographs by WT and notes changes in some. Recounts optical experiments, recent and planned, by JH on rock-salt.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
[20 June 1840]
Source of text:
TxU:H/M-0518; Reel 1093
Summary:

Payment for instruments sent to Breslau observatory. Received proofs of JH's paper, which does justice to Humphrey Lloyd. Spoke to Lord Melbourne about establishing a magnetical and meteorological observatory in vicinity of London. Compares expenses for permanent and temporary observatories.

Contributor:
John Herschel Project
From:
John Frederick William Herschel
To:
John Herschel
Date:
21 June 1840
Source of text:
MM/16/141, Royal Society
Summary:

No summary available.

Contributor:
Royal Society
From:
John William Lubbock
To:
Sir John Herschel
Date:
[21 June 1840]
Source of text:
RS MM.16.141
Summary:

Has talked to William Lamb (Lord Melbourne) about permanent magnetic and meteorological observatory. Was received 'as well as we could have anticipated,' but without definite answer. Thinks head for observatory should be appointed and give lectures.

Contributor:
John Herschel Project
From:
John David Roberton
To:
Sir John Herschel
Date:
[23 June 1840]
Source of text:
RAS:JH Archive 4/3.13 verso; Reel 7
Summary:

Announces 30 June meeting of Committee of Physics including Meteorology.

Contributor:
John Herschel Project
From:
John Sedgwick
To:
Sir John Herschel
Date:
[24 June 1840]
Source of text:
RAS:JH Archive 4/3.14 verso; Reel 7
Summary:

Committee will meet next Monday to appoint 'a Master and Mistress.'

Contributor:
John Herschel Project
Text Online
From:
Michael Faraday
To:
George Biddell Airy
Date:
24 June 1840
Source of text:
RGO 6/706
Summary:

No summary available.

Contributor:
Faraday Project
Text Online
From:
J. S. Henslow
To:
William Hutton
Date:
25 June 1840
Source of text:
American Philosophical Society Library William Hutton Papers B:H978
Summary:

No summary available.

Contributor:
Henslow Correspondence Project
From:
John David Roberton
To:
Sir John Herschel
Date:
[25 June 1840]
Source of text:
RAS:JH Archive 4/3.23 verso; Reel 7
Summary:

Announces meeting of R.S.L. Council on Saturday 27 June. [JH annotation: Received on '27th June!']

Contributor:
John Herschel Project
Text Online
From:
Robert Main
To:
Michael Faraday
Date:
25 June 1840
Source of text:
RGO 6/706
Summary:

No summary available.

Contributor:
Faraday Project
From:
Sir John Herschel
To:
Humphrey Lloyd
Date:
1840-6-[25 or earlie
Source of text:
RS:HS 25.14.19
Summary:

Sends to HL a sheet of curves laid down by [Charles] Riddell, comparing Brussels declination observations with those made in Toronto. JH frequently refers to HL's work on the subject of terrestrial magnetism.

Contributor:
John Herschel Project
Text Online
From:
George Biddell Airy
To:
Michael Faraday
Date:
26 June 1840
Source of text:
RGO 6/706
Summary:

No summary available.

Contributor:
Faraday Project
From:
Humphrey Lloyd
To:
Sir John Herschel
Date:
[26 June 1840]
Source of text:
RS:HS 11.274
Summary:

Has received JH's letter with the sheet of curves laid down by [Charles] Riddell. Comments on these. Is honored by the notice JH has taken of his share in the magnetic project. Encloses note on the wet bulb [thermometer].

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[26 June 1840]
Source of text:
RS:HS 22.55
Summary:

Thanks AD for a correction in one of JH's writings; tries to explain the partial echo that occurs when blowing across the end of an open pipe.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John William Lubbock
Date:
26 June [1840?]
Source of text:
TxU:H/L-0233; Reel 1054
Summary:

Believes that R.S.L.'s request for £3000 grant to establish permanent magnetic and meteorological observatory is too hasty. Urges caution. Points out potential problems.

Contributor:
John Herschel Project