Search: Hunt, Robert in correspondent 
1840-1849 in date 
letter in document-type 
Herschel, John in correspondent 
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Showing 41–60 of 70 items

Herschel10772

From:
Robert Hunt
To:
Sir John Herschel
Date:
[3 March 1847]
Source of text:
RS:HS 10.125
Summary:

Is desirous of procuring impressions of prismatic spectra from all parts of the globe. These should show the chemical influence of the solar rays. The B.A.A.S. may be able to help or Colonel Edward Sabine. Can JH use his influence?

Contributor:
John Herschel Project

Herschel10773

From:
Robert Hunt
To:
Sir John Herschel
Date:
[17 March 1848]
Source of text:
RS:HS 10.126
Summary:

Has been working for a long time on the supposed influence of magnetism on chemical action. Outlines an experiment he has used to show whether magnetism affects chemical action; would like his comments.

Contributor:
John Herschel Project

Herschel10774

From:
Robert Hunt
To:
Sir John Herschel
Date:
[12 April 1848]
Source of text:
RS:HS 10.127
Summary:

Encloses a copy of his own paper from the P.M. Has not found time to do the experiments suggested by JH, but hopes to shortly. Is revising some papers on the physical powers of the universe for re-publication.

Contributor:
John Herschel Project

Herschel10775

From:
Robert Hunt
To:
Sir John Herschel
Date:
[7 November 1848]
Source of text:
RS:HS 10.128
Summary:

Is grateful for JH's request to add his name as a subscriber to his book. Sends a volume entitled the Poetry of Science for JH's acceptance.

Contributor:
John Herschel Project

Herschel10776

From:
Robert Hunt
To:
Sir John Herschel
Date:
[9 November 1848]
Source of text:
RS:HS 10.129
Summary:

Is pleased he approves of his style. Regarding the experiments on the germination of seeds. His own son is progressing satisfactorily.

Contributor:
John Herschel Project

Herschel10777

From:
Robert Hunt
To:
Sir John Herschel
Date:
[21 April 1849]
Source of text:
RS:HS 10.130 & 10.136
Summary:

Is thinking of withdrawing his son from Christ's Hospital owing to his frequent epileptic fits. Should he inform the Prince Consort? Outlines his recent photographic work.

Contributor:
John Herschel Project

Herschel10778

From:
Robert Hunt
To:
Sir John Herschel
Date:
24 April [1849]
Source of text:
RS:HS 10.131 & 10.136
Summary:

Since writing to JH he has taken medical advice and decided to leave his son at Christ's Hospital for the time being. Gave a lecture at the Royal Institution on Friday evening.

Contributor:
John Herschel Project

Herschel14063

From:
Robert Hunt
To:
Sir John Herschel
Date:
[28 August 1848]
Source of text:
TxU:H/M-0285.1; Reel 1087
Summary:

Sends more copies of prospectus of RH's book (Poetry of Science) for JH to distribute.

Contributor:
John Herschel Project

Herschel4261

From:
Robert Hunt
To:
Sir John Herschel
Date:
[1841 to 1847?]
Source of text:
Harvard: Houghton AAH 67m-67 (63)
Summary:

Wishes to discuss an urgent matter.

Contributor:
John Herschel Project

Herschel4308

From:
Robert Hunt
To:
Sir John Herschel
Date:
[1841 to 1848?]
Source of text:
Harvard: Houghton AAH 67m-67 (107)
Summary:

Asks to borrow a book.

Contributor:
John Herschel Project

Herschel10730

From:
Sir John Herschel
To:
Robert Hunt
Date:
[19 April 1840]
Source of text:
RS:HS 22.49
Summary:

Exchanging further information on several aspects of the photographic process [see RH's 1840-4-15].

Contributor:
John Herschel Project

Herschel10737

From:
Sir John Herschel
To:
Robert Hunt
Date:
[10 February 1841]
Source of text:
RS:HS 22.79
Summary:

Has not lately done much work in photography, except to work with paper treated with vegetable substances.

Contributor:
John Herschel Project

Herschel10768

From:
Sir John Herschel
To:
Robert Hunt
Date:
[5 January 1846]
Source of text:
WT 68037.6 (C: RS:HS 10.121 & 22.264)
Summary:

RH's experiments are extremely interesting and deserve to be pursued. Comments on experiments made by Michael Faraday and others relating to the formation of crystals in a magnetic field and the effect such crystals have on polarized light.

Contributor:
John Herschel Project

Herschel1160

From:
Sir John Herschel
To:
Robert Hunt
Date:
[1842-12-9 or later]
Source of text:
RS:HS 25.14.15
Summary:

Is anxious for some means to be developed to get a measurable quantity [preferably by weight] from the action of a beam of light on a surface. JH has been experimenting in photography with 'flouric' compounds.

Contributor:
John Herschel Project

Herschel1235

From:
Sir John Herschel
To:
Robert Hunt
Date:
[17 August 1840]
Source of text:
RS:HS B26.68
Summary:

Thanks RH for a sample of Daguerreotype paper. Comments on some aspects of the action of 'thermic' rays and 'chemical' rays in photography.

Contributor:
John Herschel Project

Herschel3805

From:
Sir John Herschel
To:
Robert Hunt
Date:
[10 November 1840]
Source of text:
George Eastman House, 4.17 (C: RS:HS 22.70)
Summary:

Does not know anywhere that such processes as RH uses are used for registry work, although the idea is frequently raised.

Contributor:
John Herschel Project

Herschel3806

From:
Sir John Herschel
To:
Robert Hunt
Date:
1842-9
Source of text:
George Eastman House, 8.17 (C: RS:HS 22.133)
Summary:

Thanks for RH's paper on mineralogy. JH has explored use of mercury together with iron in photography.

Contributor:
John Herschel Project

Herschel3807

From:
Sir John Herschel
To:
Robert Hunt
Date:
[21 May 1841]
Source of text:
George Eastman House, 7.17 (C: RS:HS 22.87)
Summary:

Thanks RH for his 'extensive and instructive view on the present state of photography.' Found many interesting results in experimenting with vegetable substances. Surprised by RH's discovery that bi-chromate of potash is a photographic substance; JH nearly achieved this result.

Contributor:
John Herschel Project

Herschel3808

From:
Sir John Herschel
To:
Robert Hunt
Date:
1842-5
Source of text:
George Eastman House, 10.17 (C: RS:HS 22.117)
Summary:

Some information about Charles Piazzi Smyth. JH needs information about some of RH's photographic paper, which JH has tried but without success.

Contributor:
John Herschel Project

Herschel3809

From:
Sir John Herschel
To:
Robert Hunt
Date:
[15 March 1842]
Source of text:
George Eastman House, 12.17
Summary:

Believes that the operative rays in JH's thermographic process are neither 'calorific' nor 'thermal'.

Contributor:
John Herschel Project
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