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1820-1829::1825 in date 
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Showing 41–60 of 183 items

Herschel14794

From:
William Ritchie
To:
Sir John Herschel
Date:
[5 February 1825]
Source of text:
TxU:H/M-1212; Reel 1060
Summary:

Suggested improvements to John Leslie's photometer.

Contributor:
John Herschel Project

Herschel14830

From:
Sir John Herschel
To:
Unidentified
Date:
[1825-12-15 or later
Source of text:
Adler Planetarium
Summary:

Referring to the R.S.L. Royal Medals commissioned on 15 Dec. 1825 by King George IV, JH confirms that Sir Thomas Lawrence has agreed to design the medals.

Contributor:
John Herschel Project

Herschel1495

From:
Sir John Herschel
To:
William H. Keating
Date:
[19 April 1825]
Source of text:
APS (no i.d.)
Summary:

Writes to thank the Philosophical Society of Philadelphia for the gift of the catalogue of its library.

Contributor:
John Herschel Project

Herschel1842

From:
Sir John Herschel
To:
Michael Faraday
Date:
[21 May 1825]
Source of text:
WT A-300
Summary:

Rearranges a meeting of [the R. S. L.'s Glass Committee] to take place at the Pellat and Green's Glass House in Holland St.

Contributor:
John Herschel Project

Herschel2001

From:
Sir John Herschel
To:
John Pond
Date:
[23 July 1825]
Source of text:
RS:HS 14.34 (C: RS:HS 20.217)
Summary:

Introduces [C. T.] Largeteau from France, who wishes to receive from JP the observations made at Greenwich as part of the determination of the difference in longitude between the Greenwich and Paris observatories. Recounts some difficulties encountered in making the measurements.

Contributor:
John Herschel Project

Herschel2015

From:
Baden Powell
To:
Sir John Herschel
Date:
[18 November 1825]
Source of text:
RS:HS 14.47
Summary:

Missed JH at the R.S.L. meeting. Has some experiments on which he seeks JH's opinion regarding presentation at the Society. Enclosing report.

Contributor:
John Herschel Project

Herschel2098

From:
Sir John Herschel
To:
William Ritchie
Date:
[27 January 1825]
Source of text:
RS:HS 14.347 (C: RS:HS 20.197)
Summary:

Presented WR's paper on a new photometer to R.S.L. Discusses how objections may be avoided. Believes [John] Leslie's photometer should be thrown aside.

Contributor:
John Herschel Project

Herschel2099

From:
William Ritchie
To:
Sir John Herschel
Date:
[30 January 1825]
Source of text:
RS:HS 14.348
Summary:

Still anxious to become a fellow of the R.S.L. Thanks JH for offer. Would like to be elected before end of present session.

Contributor:
John Herschel Project

Herschel2100

From:
Sir John Herschel
To:
William Ritchie
Date:
[19 February 1825]
Source of text:
RS:HS 20.200
Summary:

Will present alterations of WR's paper to R.S.L. [see JH's 1825-1-27]. Asks if he may describe the similarities between WR's photometer and an instrument JH used in Italy and Sicily.

Contributor:
John Herschel Project

Herschel2101

From:
William Ritchie
To:
Sir John Herschel
Date:
[3 March 1825]
Source of text:
RS:HS 14.349
Summary:

Pleased JH liked his paper on differential photometer. Discusses apparatus for experiments on light. Describes some papers he has written and some he is writing.

Contributor:
John Herschel Project

Herschel2442

From:
Sir John Herschel
To:
Edward Sabine
Date:
[20 March 1825]
Source of text:
RS:HS 15.1 & 20.202
Summary:

Comments on ES's measurement [in his Account of Experiments to Determine the Figure of the Earth] indicating 'the increase of the fraction expressing the earth's compression.' Predicts that ES's result will cause a 'sensation,' but does not commit himself to it.

Contributor:
John Herschel Project

Herschel2555

From:
Sir John Herschel
To:
Edward Sabine
Date:
[3 April 1825]
Source of text:
RS:HS 15.2 (C: RS:HS 20.204)
Summary:

Responds to ES's proposal to conduct a series of meteorological observations from the peak of Teneriffe. Promises to bring it before the Board of Longitude for consideration for support.

Contributor:
John Herschel Project

Herschel2721

From:
Edward Sabine
To:
Sir John Herschel
Date:
[4 April 1825]
Source of text:
RS:HS 15.3
Summary:

Clarifies issues discussed in an earlier letter. Discusses whether the project of making meteorological observations will be feasible if the Board of Longitude does not offer financial support. Attempts to arrange a meeting with JH.

Contributor:
John Herschel Project

Herschel2722

From:
Sir John Herschel
To:
Edward Sabine
Date:
[5 April 1825]
Source of text:
RS:HS 15.4 & 20.205
Summary:

Responds to ES's letter of 1825-4-4, stating that JH now understands that ES will proceed with the Teneriffe observations only if funds are provided. Praises Sabine's previous work.

Contributor:
John Herschel Project

Herschel2723

From:
Edward Sabine
To:
Sir John Herschel
Date:
[1825-4]
Source of text:
RS:HS 15.5
Summary:

Shares JH's doubts whether the Board of Longitude will fund the Teneriffe expedition, the importance of which he again stresses. Cannot personally cover the costs. Thanks JH for his support and praise.

Contributor:
John Herschel Project

Herschel2724

From:
Sir John Herschel
To:
Edward Sabine
Date:
[8 April 1825]
Source of text:
RS:HS 15.6 (C: RS:HS 20.206)
Summary:

On 1825-4-7 presented ES's proposal for experiments at Teneriffe to the Board of Longitude, which judged the experiments not sufficiently relevant to the Board's concerns. Offers to seek endorsement from the R.S.L.

Contributor:
John Herschel Project

Herschel2725

From:
Edward Sabine
To:
Sir John Herschel
Date:
[11 April 1825]
Source of text:
RS:HS 15.7
Summary:

Encourages JH to bring ES's proposal for Teneriffe experiments before the R.S.L. Council.

Contributor:
John Herschel Project

Herschel2726

From:
Sir John Herschel
To:
Edward Sabine
Date:
[21 April 1825]
Source of text:
RS:HS 15.8 (C: RS:HS 20.208)
Summary:

Invites ES to join him and other scientists for dinner. Requests that ES prepare a detailed description and justification of his proposed Teneriffe experiments for consideration by the R.S.L. Council.

Contributor:
John Herschel Project

Herschel2727

From:
Sir John Herschel
To:
Edward Sabine
Date:
[6 May 1825]
Source of text:
RS:HS 20.210
Summary:

Read your proposal on experiments at Teneriffe to the R.S.L. Council, which declined to make 'an especial recommendation' in support of them to the government.

Contributor:
John Herschel Project

Herschel2728

From:
Sir John Herschel
To:
Edward Sabine
Date:
[20 June 1825]
Source of text:
RS:HS 15.9 (C: RS 20.215)
Summary:

Six artillery men have been placed under ES's command. Encloses letters from Charles Bonne. Asks ES to oversee the arrival of 180 rockets to be used at Wrotham and Fairlight. Proposes that ES test whether a light at Wrotham can be seen at Fairlight in which case gunpowder will be used instead of rockets. Sets date for ES to meet Bonne in Hornoy. Urges ES to record his expenses for the Board of Longitude.

Contributor:
John Herschel Project
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