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1850-1859::1854 in date 
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Herschel6784

From:
William Rutter Dawes
To:
Sir John Herschel
Date:
[29 December 1854]
Source of text:
RS:HS 6.101
Summary:

Is much obliged for the loan of G. B. Amici's micrometer. Comments on some of his readings with it. Is sorry to hear of the ill-health of Lady Herschel.

Contributor:
John Herschel Project

Herschel6819

From:
Henry T. De La Beche
To:
Sir John Herschel
Date:
[5 January 1854]
Source of text:
RS:HS 6.135
Summary:

Would he look at the accompanying work by O. P. A. P. Dufrénoy. Feels that Dufrénoy would advocate only that which was right.

Contributor:
John Herschel Project

Herschel7024

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[1 November 1854]
Source of text:
RS:HS 6.268
Summary:

Sending an equation for JH to solve. Thanks for sending details of the weight of the florin, and the song from Punch. If he wishes JH may borrow books from the College library.

Contributor:
John Herschel Project

Herschel7026

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[3 November 1854]
Source of text:
RS:HS 6.269
Summary:

Sending one of his equations for JH's comments.

Contributor:
John Herschel Project

Herschel7252

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[29 July 1854]
Source of text:
RS:HS 6.433
Summary:

Sending a comic squib.

Contributor:
John Herschel Project

Herschel7564

From:
John Banks
To:
Sir John Herschel
Date:
[31 January 1854]
Source of text:
RAS:JH Archive 10/5.81; Reel 9
Summary:

Requests donation of copy of JH's Cape Results to library of Mechanics Institution.

Contributor:
John Herschel Project

Herschel7565

From:
John Banks
To:
Sir John Herschel
Date:
[22 February 1854]
Source of text:
RAS:JH Archive 10/5.82; Reel 9
Summary:

Acknowledges receipt of JH's Cape Results for library of Mechanics Institution.

Contributor:
John Herschel Project

Herschel7637

From:
L. Caggiati
To:
Sir John Herschel
Date:
[24 August 1854]
Source of text:
RAS:JH Archive 10/6.4; Reel 9
Summary:

LC, from Parma [Italy], and Baron de Lutteroth wish to visit Royal Mint and meet JH. [JH annotation of 27 Aug.: Ordered Smith, Elder & Co. to give copy of JH's Cape Results to L. Caggiati for delivery to 'Prof. [Cobla Dinester?] of [Royal?] Observatory in Parma.]

Contributor:
John Herschel Project

Herschel7762

From:
John R. Hind
To:
Sir John Herschel
Date:
[23 June 1854]
Source of text:
RAS:JH Archive 14/3.18; Reel 11
Summary:

Computation of Alpha Centauri's angle and distance, derived with JH's 'graphical method.' Compares this with results by other astronomers.

Contributor:
John Herschel Project

Herschel7858

From:
Henry Warburton
To:
Sir John Herschel
Date:
[10 April 1854]
Source of text:
RS:HS 18.62
Summary:

Heard JH plans new edition of Examples of Finite Differences [1820]. Will send list of errors HW found in original. Results of HW's investigation of self-repeating series of numbers.

Contributor:
John Herschel Project

Herschel7859

From:
Henry Warburton
To:
Sir John Herschel
Date:
11 [May] 1854
Source of text:
RS:HS 18.63
Summary:

Recalls JH's predecessor [Isaac Newton] at Mint was also interested in Bernoulli's 'Isoperimetrical Problems.' HW plans paper on new expression for coefficients of differences of zero in self-repeating series.

Contributor:
John Herschel Project

Herschel7860

From:
Henry Warburton
To:
Sir John Herschel
Date:
[16 August 1854]
Source of text:
RS:HS 18.64
Summary:

Cambridge [Philosophical] Society will publish HW's paper on self-repeating series. Suggests JH clarify some equations in new edition of [Examples of Finite Differences (1820)].

Contributor:
John Herschel Project

Herschel7861

From:
Henry Warburton
To:
Sir John Herschel
Date:
[17 August 1854]
Source of text:
RS:HS 18.65
Summary:

Additional suggestions for improving clarity of equations in new edition of JH's [Examples of Finite Differences (1820)].

Contributor:
John Herschel Project

Herschel7862

From:
Henry Warburton
To:
Sir John Herschel
Date:
[19 August 1854]
Source of text:
RS:HS 18.66
Summary:

Additional improvements for new edition of JH's [Examples of Finite Differences (1820)].

Contributor:
John Herschel Project

Herschel7864

From:
Henry Warburton
To:
Sir John Herschel
Date:
[25 August 1854]
Source of text:
RS:HS 18.68
Summary:

Further discussion of need for two constants [see HW's 1854-[5]-11]. Sends first installment of errata HW found in JH's [Examples of Finite Differences (1820)]. Realizes JH's duties [at Mint] afford little time to publish new edition. Suggests printing only errata list to first edition.

Contributor:
John Herschel Project

Herschel7865

From:
Henry Warburton
To:
Sir John Herschel
Date:
[26 September 1854]
Source of text:
RS:HS 18.69
Summary:

Sends copy of HW's paper, with manuscript listing properties of differences of zero. Is there a published table of such differences like that in JH's [Examples of Finite Differences (1820)]?

Contributor:
John Herschel Project

Herschel7866

From:
Henry Warburton
To:
Sir John Herschel
Date:
[5 October 1854]
Source of text:
RS:HS 18.70
Summary:

Learned to simplify expression for Bernoulli's number B=2n+1 using JH's formula.

Contributor:
John Herschel Project

Herschel7867

From:
[Henry Warburton]
To:
Sir John Herschel
Date:
[9 October 1854]
Source of text:
RS:HS 18.71
Summary:

Offers improved version of formulas sent in previous letter.

Contributor:
John Herschel Project

Herschel7868

From:
Henry Warburton
To:
Sir John Herschel
Date:
[15 November 1854]
Source of text:
RS:HS 18.72
Summary:

Happy that JH may be leaving Mint and returning to scientific pursuits. HW resumed work on equations in finite differences. Hopes to reconcile discrepancy between JH's and P. S. Laplace's solutions. JH's solution renders only particular, not general, solutions.

Contributor:
John Herschel Project

Herschel7869

From:
Henry Warburton
To:
Sir John Herschel
Date:
[17 November 1854]
Source of text:
RS:HS 18.73
Summary:

Approves of JH sharing HW's findings. HW on excellent terms with Augustus De Morgan. Suspects two integrals exist, one real and one imaginary, for P. S. Laplace's equation.

Contributor:
John Herschel Project
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