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1820-1829 in date 
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Herschel1947

From:
Sir John Herschel
To:
Edward Pigott
Date:
[8 May 1821]
Source of text:
DMC 695A.885.26
Summary:

Sends EP a copy of the first annual report of [Astronomical Society?] and invites EP to join the 'circle'.

Contributor:
John Herschel Project

Herschel1997

From:
Sir John Herschel
To:
John Pond
Date:
[29 October 1821]
Source of text:
RS:HS 14.30 (C: RS:HS 20.126)
Summary:

Provides a detailed critique of a mathematical paper by [J. M. H.] Wronski, which JP presented on Wronski's behalf to the R.S.L. Suggests that JP urge Wronski to withdraw the paper.

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

Herschel2058

From:
Sir John Herschel
To:
John Ramage
Date:
[12 November 1826]
Source of text:
RS:HS 14.300 (C: RS:HS 20.241)
Summary:

Discusses the construction of JR's telescope. Mentions a number of material changes that must be made if it is to be used for sweeping [see JR's 1826-9-30].

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

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

Herschel2108

From:
Sir John Herschel
To:
Unidentified
Date:
[1828-1-11 or later]
Source of text:
RS:HS 14.355b
Summary:

Requests particulars concerning the electors for position at University of Virginia for which William Ritchie has applied. Encloses Ritchie's letter of 1827-12-6.

Contributor:
John Herschel Project

Herschel2127

From:
Sir John Herschel
To:
Thomas Romney Robinson
Date:
[7 December 1829]
Source of text:
Cambridge University Library 7656/TR60 (C: RS:HS 21.53)
Summary:

Congratulates TR on his volume of astronomical observations. Skeptical about alleged changes in Orion nebula. Feels better telescopes and drawings would be needed to confirm this. Discusses own double star observations.

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

Herschel2510

From:
Sir John Herschel
To:
Adam Sedgwick
Date:
[9 October 1820]
Source of text:
RS:HS 15.420 (C: RS:HS 20.101)
Summary:

Asks AS to send him plagiedral quartz for experimentation. Unable to commence Cornish expeditions with Charles Babbage. Requests AS discuss publication of their [JH's, George Peacock's, and Babbage's] book with Peacock.

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

Herschel2693

From:
Sir John Herschel
To:
William Somerville
Date:
[4 August 1826]
Source of text:
RS:HS 16.385 (C: RS:HS 20.236)
Summary:

Sends directions for chrome solution and the magnetic apparatus and instructions for its use, as requested [in WS's 1826-8-2]. Discusses experiments with magnets.

Contributor:
John Herschel Project

Herschel2694

From:
Sir John Herschel
To:
William Somerville
Date:
[7 October 1829]
Source of text:
RS:HS 16.386
Summary:

Invites the Somervilles to dinner the following week.

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

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

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

Herschel2735

From:
Sir John Herschel
To:
Edward Sabine
Date:
[23 February 1826]
Source of text:
RS:HS 15.15b
Summary:

Denies any knowledge of a R.S.L. Council meeting. Trusts the council will make its decisions based on public duty and science, not on the fact that the decision must be defended in later discussions. Has passed [George] Fisher's letter on to members as ES requested.

Contributor:
John Herschel Project

Herschel2864

From:
Sir John Herschel
To:
Wilhelm Struve
Date:
[31 May 1825]
Source of text:
RS:HS 20.213
Summary:

Acknowledges receipt of WS's second volume of observations and the new telescope's results. Mentions Caroline Herschel's catalogue of nebulae.

Contributor:
John Herschel Project
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