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Herschel, John in correspondent 
1840-1849::1845::04 in date 
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Herschel104

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[4 April 1845]
Source of text:
RGO 6.675.391
Summary:

Last letter to JH was private [see GA's 1845-4-1].

Contributor:
John Herschel Project

Herschel105

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[7 April 1845]
Source of text:
RGO 6.675.393 (C: RGO 6.694.357)
Summary:

Gives detailed, official, replies to the questions in the magnetic committee circular [see JH's 1844-12-5].

Contributor:
John Herschel Project

Herschel106

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[9 April 1845]
Source of text:
RGO 6.675.397
Summary:

Illegible.

Contributor:
John Herschel Project

Herschel10765

From:
Robert Hunt
To:
Sir John Herschel
Date:
[9 April 1845]
Source of text:
RS:HS 10.118
Summary:

Has been appointed keeper of Mining records at the Museum of Economic Geology. Hopes to meet him personally and thank him for his assistance.

Contributor:
John Herschel Project

Herschel11469

From:
John William Lubbock
To:
Sir John Herschel
Date:
[5 April 1845]
Source of text:
RS:HS 11.382
Summary:

The President was requested to write to the East India Company about the observatories. Continuance of the magnetic observations at Greenwich was referred to the Committee of Physics. Cannot find where Nicolas Clement-Desormes's observations are published. Has been studying the wet bulb problem. Capt. Herbert has denounced the article on hygrometry in Brewster's Encyclopaedia.

Contributor:
John Herschel Project

Herschel11470

From:
John William Lubbock
To:
Sir John Herschel
Date:
[17 April 1845]
Source of text:
RS:HS 11.383
Summary:

Has been with Philip Melvill of the East India Co. discussing the printing of the observations. Would it be a good use of JH's photographic papers to take a reverse of William Parsons' (3rd Earl of Rosse) drawings of nebulae? Cannot obtain Nicolas Clement-Desormes's or John Sharpe's papers. Doubts if the mode of measuring latent heat hitherto used can be recommended for accuracy.

Contributor:
John Herschel Project

Herschel1193

From:
Richard Taylor
To:
Sir John Herschel
Date:
15 April [1845]
Source of text:
RS:HS B26.10
Summary:

Asks JH's opinion on a paper on magnetism by Karl Reichenbach, which has some 'very extraordinary' statements.

Contributor:
John Herschel Project

Herschel13618

From:
Henry Unwin Addington
To:
Sir John Herschel
Date:
[15 April 1845]
Source of text:
TxU:H/M-0003; Reel 1062
Summary:

Will direct JH's 14 Apr. letter to Prince Metternich.

Contributor:
John Herschel Project

Herschel13645

From:
Charles Babbage
To:
Sir John Herschel
Date:
[3 April 1845]
Source of text:
TxU:H/M-0028; Reel 1062
Summary:

As trustee of marriage settlement of CB's sister [Mary Anne Hollier], JH is asked to sign enclosed order. Reports distribution of money to sister and to H. J. Hollier.

Contributor:
John Herschel Project

Herschel13646

From:
Charles Babbage
To:
Sir John Herschel
Date:
[8 April 1845]
Source of text:
TxU:H/M-0029; Reel 1062
Summary:

Received JH's directive to send dividend to Mary Ann Hollier. Other money is invested in property at Cardiff, owned by Mr. Hollier. CB in bad health. Questions authorship of Vestiges [of Creation].

Contributor:
John Herschel Project

Herschel13868

From:
Thomas Graham
To:
Sir John Herschel
Date:
[14 April 1845]
Source of text:
TxU:H/M-0217; Reel 1087
Summary:

Sends specimen of esculine, or polychrome, extracted from horse chestnut. It exhibits optical properties that JH recently investigated. Offers to send specimen of colophene. Asks JH's recommendations for foreign secretary of R.S.L., following death of J. F. Daniell. This officer must supervise magnetic and meteorological observatories. [JH annotation: 'By all means appoint Sab(ine).']

Contributor:
John Herschel Project

Herschel14358

From:
Edward Sabine
To:
Sir John Herschel
Date:
7 April [1845]
Source of text:
TxU:H/M-0517.2; Reel 1093
Summary:

Will invite G. A. Erman to act as B.A.A.S. commissioner in reduction of 1829 Gaussian constant. Will try to remedy misconceptions of G. B. Airy. T. M. Brisbane will not get involved. Testing new magnetic instrument by Humphrey Lloyd for Arctic expedition. Invite C. F. Gauss to Cambridge.

Contributor:
John Herschel Project

Herschel14395

From:
Edward Sabine
To:
Sir John Herschel
Date:
[1 April 1845]
Source of text:
TxU:H/M-0521.11; Reel 1093
Summary:

Reply from G. A. Erman to JH's circular is best one yet received. Erman recommends calculating magnetic constants of 1829. ES suggests grant from B.A.A.S. to fund this. Alexander Humboldt will reply soon. Charles Wheatstone should describe new apparatus in letter to JH that can be sent to observatories.

Contributor:
John Herschel Project

Herschel14396

From:
Edward Sabine
To:
Sir John Herschel
Date:
[4 April 1845]
Source of text:
TxU:H/M-0521.12; Reel 1093
Summary:

Received reply from Karl Kreil in letter from Count Senftenberg, who owns private magnetic and meteorological observatory east of Prague run by Kreil's former assistant. ES asks JH to write letter to Clemens von Metternich, as requested by Senftenberg. High regard for Kreil's work.

Contributor:
John Herschel Project

Herschel14397

From:
Edward Sabine
To:
Sir John Herschel
Date:
[7 April 1845]
Source of text:
TxU:H/M-0521.13; Reel 1093
Summary:

Received thirteen replies to JH's circular; nine remain unanswered. Suggests printing these, before they are published by B.A.A.S, and distributing these along with second circular by JH.

Contributor:
John Herschel Project

Herschel14398

From:
Edward Sabine
To:
Sir John Herschel
Date:
[11 April 1845]
Source of text:
TxU:H/M-0521.14; Reel 1093
Summary:

H. U. Addington will send JH's letter to Clemens von Metternich via Robert Gordon, English minister to Vienna. JH may include George Peacock's signature also. Printer will send proofs of replies to JH's circular to JH for corrections. JH's estimate for expenses for observatories is too high. Sent copy of JH's circular to Charles Wheatstone.

Contributor:
John Herschel Project

Herschel14399

From:
Edward Sabine
To:
Sir John Herschel
Date:
[14 April 1845]
Source of text:
TxU:H/M-0521.15; Reel 1093
Summary:

Published opinions on magnetic and meteorological survey should be restricted to correspondents who were directly involved in observations, particularly foreign participants. Most others may express their views at B.A.A.S. meeting in Cambridge. Recommends omitting M. F. Maury's letter and including that of J. M. Gilliss.

Contributor:
John Herschel Project

Herschel144

From:
Edward Sabine
To:
Sir John Herschel
Date:
[21 April 1845]
Source of text:
RGO 6.694.358
Summary:

Response to questions on magnetic circular sent out by JH [see JH's 1844-12-5].

Contributor:
John Herschel Project

Herschel14400

From:
Edward Sabine
To:
Sir John Herschel
Date:
[18 April 1845]
Source of text:
TxU:H/M-0521.16; Reel 1093
Summary:

ES will write to M. F. Maury. Concurrence of both R.S.L. and B.A.A.S. is needed before congress is announced. Proofs of foreign responses to JH's circular will be ready next week.

Contributor:
John Herschel Project

Herschel14443

From:
Richard Sheepshanks
To:
Sir John Herschel
Date:
[20 April 1845]
Source of text:
TxU:H/M-0530; Reel 1093
Summary:

George Bishop refuses permission for W. R. Dawes to edit Dawes's own observations. Portrait of Francis Baily should be nearly finished. Auction of Baily's books. Plans to start over 'de novo' and not use Baily's method for evaluating standards of measure. Convinced that standards must be connected with Ordnance survey of U.K. and T. F. Colby's units.

Contributor:
John Herschel Project
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