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Herschel4530

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[20 February 1864]
Source of text:
RS:HS 14.88
Summary:

Richard Hodgson claims to have invented the diagonal solar eyepiece despite JH's description of it in Cape Results.

Contributor:
John Herschel Project

Herschel4545

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[21 February 1864]
Source of text:
RS:HS 14.89
Summary:

Richard Hodgson pursues claim to invention of the diagonal solar eyepiece while claiming that JH disclaimed the invention.

Contributor:
John Herschel Project

Herschel4537

From:
Charles Pritchard
To:
Richard Hodgson
Date:
[1 March 1864]
Source of text:
RS:HS 14.90
Summary:

Cites quotation from Cape Results proving that JH invented the diagonal solar eyepiece. Discusses RH's claim. Note to JH accompanies this letter.

Contributor:
John Herschel Project

Herschel4528

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[31 March 1864]
Source of text:
RS:HS 14.91
Summary:

Forwards letter concerning 'solar bright particles' by W. R. Dawes. Inquires if diagonal solar eyepiece used in JH's solar spectrum observations.

Contributor:
John Herschel Project

Herschel4538

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[9 November 1864]
Source of text:
RS:HS 14.92
Summary:

Compares W. L. Newman's and CP's calculations of optical coefficients to those in JH's work. Sends JH formulae and tables for calculating telescopic lens thickness and shape in relation to the dimensions of the telescope. Wishes JH luck on Iliad.

Contributor:
John Herschel Project

Herschel4546

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[10 November 1864]
Source of text:
RS:HS 14.93
Summary:

Compares JH's equation for lens curvature with that of C. F. Gauss.

Contributor:
John Herschel Project

Herschel4268

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[24 November 1864]
Source of text:
RS:HS 14.94
Summary:

Praises JH's Iliad. Asks R.S.L. for funds to cover expenses incurred by spherical observations. Details information to be included in optical tables.

Contributor:
John Herschel Project

Herschel4191

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[21 December 1864]
Source of text:
RS:HS 14.95
Summary:

Requests JH's reflections on the deceased Wilhelm Struve. Discusses making of telescope object glass. Continues work on the optical tables.

Contributor:
John Herschel Project

Herschel4282

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[11 February 1865]
Source of text:
RS:HS 14.96
Summary:

R.S.L. approves of CP's optical work, believing it will be helpful at observatories abroad. CP comments on Alexander Herschel's prism experiments.

Contributor:
John Herschel Project

Herschel4087

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[6 October 1865]
Source of text:
RS:HS 14.97
Summary:

Asks if JH anticipated the results of W. L. Newman's work on lens curvature.

Contributor:
John Herschel Project

Herschel4114

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[19 February 1866]
Source of text:
RS:HS 14.98
Summary:

Informs JH, Charles Babbage, and James South that they are the surviving original members of the R.A S. Requests JH write an account of the R.A.S.'s founding. Discusses the evidence of the 'personal will' of God in creation.

Contributor:
John Herschel Project

Herschel4370

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[17 April 1866]
Source of text:
RS:HS 14.99
Summary:

R.A.S. wants JH to direct the preparation of William Herschel's catalogue of double stars for publication. CP suggests Alexander Herschel prepare the catalogue with JH's supervision. G. B. Airy observes the 'willow leaves.'

Contributor:
John Herschel Project

DCP-LETT-5234

From:
Charles Pritchard
To:
Charles Robert Darwin
Date:
8 Oct 1866
Source of text:
DAR 174: 78
Summary:

Sends sermon he preached at the BAAS Nottingham meeting ["The continuity of the schemes of nature and revelation" (1866)], in which he disagrees with CD on the gradual genesis of the human eye by natural selection.

Contributor:
Darwin Correspondence Project

Herschel4371

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[17 November 1866]
Source of text:
RS:HS 14.100
Summary:

Compares observations of meteor shower in Orion with JH. Describes methods and observations in detail.

Contributor:
John Herschel Project

Herschel4548

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[27 March 1867]
Source of text:
RS:HS 14.102
Summary:

Asks if JH still considering editing William Herschel's R.S.P.T. publications. Suggests that Alexander Herschel edit the work. Speculates that William Herschel observed the 'willow leaves.' JH's star catalogue will be printed by the R.A.S.

Contributor:
John Herschel Project

DCP-LETT-5797

From:
Charles Pritchard
To:
Charles Robert Darwin
Date:
24 Jan 1868
Source of text:
DAR 174: 79
Summary:

Congratulations on success of CD’s son [George].

Contributor:
Darwin Correspondence Project

Herschel14185

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[10 May 1868]
Source of text:
TxU:H/M-0411; Reel 1087
Summary:

Informal request for JH to write biography of W. R. Dawes for R.A.S. Recent marriages in CP's family.

Contributor:
John Herschel Project

Herschel4515

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[11 March 1869]
Source of text:
RS:HS 14.104
Summary:

Has discovered William Herschel's memoirs in R.A.S. library; arranged and read them. Asks JH whether any copies exist so the originals can be checked for completion before binding. Questions JH on William Herschel's opinion of the nature of nebulae and boundaries of the galaxy.

Contributor:
John Herschel Project

Herschel4269

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[18 March 1869]
Source of text:
RS:HS 14.105
Summary:

Suggests remedy for bronchitis problem in JH family. Young John Herschel's work on nebulae pleases CP. Comments on William Huggins's work on solar spectra.

Contributor:
John Herschel Project

Herschel4547

From:
Charles Pritchard
To:
Sir John Herschel
Date:
[27 April 1871]
Source of text:
RS:HS 14.106
Summary:

Tests several possible rules for curving lenses including W. L. Newman's and [Thomas] Cooke's. Tries to put W. L. Newman's rules for lens thickness-to-curvature ratios in a simpler equation.

Contributor:
John Herschel Project
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