Search: Herschel, John in correspondent 
1840-1849::1842 in date 
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Showing 61–80 of 302 items

Herschel12009

From:
Sir John Herschel
To:
Adalbert Adolf Mühry
Date:
[10 November 1842]
Source of text:
RS:HS 12.371 & 22.141
Summary:

Is anxious about his aunt Caroline Herschel and would like news of her health.

Contributor:
John Herschel Project

Herschel12023

From:
Roderick Impey Murchison
To:
Sir John Herschel
Date:
[16 June 1842]
Source of text:
RS:HS 12.385
Summary:

Would like JH to come to Manchester on 23-25 to give support for the Kew Observatory. F. W. Bessel and G. A. Erman are coming.

Contributor:
John Herschel Project

Herschel12039

From:
Roderick Impey Murchison
To:
Sir John Herschel
Date:
[5 March 1842]
Source of text:
RS:HS 12.402
Summary:

Sends a memoir he has scribbled off for next Wednesday's meeting. Would like JH's advice on several points.

Contributor:
John Herschel Project

Herschel12040

From:
Roderick Impey Murchison
To:
Sir John Herschel
Date:
[10 March 1842]
Source of text:
RS:HS 12.403
Summary:

Many thanks for JH's explanations, which gave satisfaction to the geologists. Gives two queries of his own for which he would like clarification. Can they print JH's Alpine phenomena memoir?

Contributor:
John Herschel Project

Herschel12074

From:
Roderick Impey Murchison
To:
Sir John Herschel
Date:
[1842]
Source of text:
RS:HS 12.440
Summary:

Pleased that JH can come on the occasion of F. W. Bessel's visit, as W. R. Hamilton, G. B. Airy, and Francis Baily cannot come. Comments regarding Foreign Orders.

Contributor:
John Herschel Project

Herschel12157

From:
Minna Mädler
To:
Sir John Herschel
Date:
1842-3-28 to 1842-4-
Source of text:
RS:HS 13.15
Summary:

Has only just received JH's parcel dispatched some six months ago, due to lack of transport during the winter months. JH's poem on the Old Telescope has been in great demand. Pass the enclosed to Miss Hamilton. Would like an autograph of JH for her album.

Contributor:
John Herschel Project

Herschel12264

From:
Thomas John Newbold
To:
Sir John Herschel
Date:
[15 July 1842]
Source of text:
RS:HS 13.121
Summary:

On his last passage down the Red Sea the Captain informed TN of the singular alteration of his chronometers. Comments on this and would like JH's views. Magnetic station at Aden has never been set up and the instruments are still at Bombay. Examined the ancient canal while at Suez. Will be pleased to assist JH in any way.

Contributor:
John Herschel Project

Herschel1236

From:
Sir John Herschel
To:
Editor of the [Royal Society Philosophical Transactions?]
Date:
[2 November 1842]
Source of text:
RS:HS B26.69
Summary:

Comments on some papers on vision and photography by Mr. Moser, and compares this with some of JH's own writings on the subject.

Contributor:
John Herschel Project

Herschel12437

From:
George Peacock
To:
Sir John Herschel
Date:
[25 March 1842]
Source of text:
RS:HS 13.294
Summary:

About arrangements to visit JH at Collingwood.

Contributor:
John Herschel Project

Herschel12645

From:
Sir John Herschel
To:
Mary Baldwin
Date:
[16 September 1842]
Source of text:
TxU:H/L-0065; Reel 1054
Summary:

Birth of JH's ninth child [Julia].

Contributor:
John Herschel Project

Herschel12722

From:
Sir John Herschel
To:
George Dollond
Date:
[15 December 1842]
Source of text:
TxU:H/L-0137; Reel 1054
Summary:

Sends description and drawings of JH's actinoscope. Requests estimate for time and expense of constructing it. Questions about clock mechanism and prisms.

Contributor:
John Herschel Project

Herschel12723

From:
Sir John Herschel
To:
George Dollond
Date:
[25 December 1842]
Source of text:
TxU:H/L-0138; Reel 1054
Summary:

Regrets that GD cannot build JH's entire actinoscope. If GD can make at least mechanical components, JH will supply optics and clockwork. Can GD complete these [by end of March]? Funds are limited; please estimate cost.

Contributor:
John Herschel Project

Herschel12724

From:
Sir John Herschel
To:
George Dollond
Date:
[29 December 1842]
Source of text:
TxU:H/L-0139; Reel 1054
Summary:

Confirms scale of drawings [for JH's actinoscope]. Has found simple contrivance to replace clockwork. Will order lenses and prisms from Munich; all English glass has color aberrations.

Contributor:
John Herschel Project

Herschel12742

From:
Sir John Herschel
To:
James David Forbes
Date:
[15 November 1842]
Source of text:
RS:HS 25.6.15 (C: TxU:H/L-0159; Reel 1054)
Summary:

Received JF's paper on 'thermographic process.' Believes that thermic rays were responsible for experimental results of JF, J. W. Draper, and Ludwig Moser. JH's theory of and experiments with thermic rays, which are different from 'calorific' and visible rays, in solar spectrum.

Contributor:
John Herschel Project

Herschel1279

From:
Sir John Herschel
To:
Henry Goulburn
Date:
[1842-9-16 or later]
Source of text:
RS:HS B27.51
Summary:

Writes to the Chancellor of the Exchequer to give JH's opinion about the probable utility of continuing to spend money on Charles Babbage's calculating machine.

Contributor:
John Herschel Project

Herschel1280

From:
Sir John Herschel
To:
Charles Babbage
Date:
[1842?]
Source of text:
RS:HS B27.52
Summary:

Tells CB about a visit by JH and Wolryche Whitmore to the Duke [of ?] to present the case for more government funds for Charles Babbage's calculating machine.

Contributor:
John Herschel Project

Herschel12806

From:
Sir John Herschel
To:
Joseph Henry Kay
Date:
[19 April 1842]
Source of text:
TxU:H/L-0211; Reel 1054
Summary:

Impressed by accuracy of actinometer measurements made by JK, Joseph Dayman, and P. A. Scott from Feb. to Sept. 1841 at JK's observatory at Rossbank [Tasmania]. Suggests methods to improve readings and simplify reductions.

Contributor:
John Herschel Project

Herschel1281

From:
[Alexander J. B. Hope?]
To:
Sir John Herschel
Date:
[6 July 1842]
Source of text:
RS:HS B27.53
Summary:

A proposal to complete the calculating machine has been made by Charles Babbage, and AH wants JH's opinion of it.

Contributor:
John Herschel Project

Herschel12889

From:
Sir John Herschel
To:
Unidentified
Date:
[1842]
Source of text:
TxU:H/L-0301; Reel 1054
Summary:

Submit revisions to instructions for conducting and reporting magnetic and meteorological observations.

Contributor:
John Herschel Project

Herschel12949

From:
Sir John Herschel
To:
Edward Sabine
Date:
[23 January 1842]
Source of text:
TxU:H/L-0361; Reel 1054
Summary:

JH's reasons for requesting three-year extension of magnetic and meteorological survey from British government and H.E.I.C. Preliminary results from global stations.

Contributor:
John Herschel Project
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