Search: John Herschel Project in contributor 
Herschel, John in correspondent 
1840-1849 in date 
letter in document-type 
No in transcription-available 
Sorted by:

Showing 181–200 of 3802 items

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

Herschel10738

From:
Robert Hunt
To:
Sir John Herschel
Date:
[5 June 1841]
Source of text:
RS:HS 10.90
Summary:

Returns with grateful thanks the example of photographs recently sent him. They open up a new field of curious processes. Will not have much time this summer for photographic experiments as he is carrying out a series of investigations into the air of mines. Has been experimenting with the cyanurets.

Contributor:
John Herschel Project

Herschel10739

From:
Robert Hunt
To:
Sir John Herschel
Date:
[28 May 1842]
Source of text:
RS:HS 10.91
Summary:

Was hoping to send him some positive paper, but has been unable to prepare this due to a medical problem. Did make a sheet or two today. Returns some of the specimens JH sent him but would like to keep those made by JH himself.

Contributor:
John Herschel Project

Herschel1074

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[16 August 1843]
Source of text:
RS:HS 25.6.17
Summary:

Has received a request from the Admiralty to order a new telescope for the Cape observatory; at the same time, JH has received an unsolicited offer of a lens. JH seeks advice and information from GA.

Contributor:
John Herschel Project

Herschel10740

From:
Robert Hunt
To:
Sir John Herschel
Date:
[12 October 1842]
Source of text:
RS:HS 10.92
Summary:

Is grateful for the specimens sent him. Has been carrying out a series of experiments on the Calotype process with extraordinary results, especially the crimson skies. What does he think of the idea of publishing a treatise on 'Light' considered as a chemical agent?

Contributor:
John Herschel Project

Herschel10741

From:
Robert Hunt
To:
Sir John Herschel
Date:
[9 November 1842]
Source of text:
RS:HS 10.93
Summary:

Has been working at [L. F.] Moser's experiments and believes he is wrong in considering latent light as the agent that produces the photographic image. Read a paper last evening on the subject, which will be printed. Has been producing images by the action of heat and electricity and proposes to call this process Thermography.

Contributor:
John Herschel Project

Herschel10742

From:
Robert Hunt
To:
Sir John Herschel
Date:
[21 November 1842]
Source of text:
RS:HS 10.94
Summary:

Was pleased to receive JH's letter and to read that he had really proved the existence of [invisible light?]. One of his students has produced images on copper plates by sulfur fumes. Has just seen Macedoine Melloni's memoir, which is now governed by JH's views.

Contributor:
John Herschel Project

Herschel10743

From:
Robert Hunt
To:
Sir John Herschel
Date:
[8 December 1842]
Source of text:
RS:HS 10.95
Summary:

Was very pleased with the specimen JH sent him; it is still in good condition. Has he read [John William] Draper's paper? Comments on some of the points. Outlines some of his own proposed experiments.

Contributor:
John Herschel Project

Herschel10744

From:
Robert Hunt
To:
Sir John Herschel
Date:
[15 December 1842]
Source of text:
RS:HS 10.96
Summary:

Much indebted for his paper on the influence of the solar spectrum on vegetable colors. Has a series of experiments ready that he hopes will resolve some of his own doubts. Does not like the term J. W. Draper uses for the new rays.

Contributor:
John Herschel Project

Herschel10745

From:
Robert Hunt
To:
Sir John Herschel
Date:
[24 December 1842]
Source of text:
RS:HS 10.97
Summary:

Sends a few samples of plates made by the cyanotype process; they are poor because the sun has not been very strong of late. Comments on this process and wishes JH would make a few experiments with his more perfect apparatus. Inclined to agree with him about the mechanism of the eye.

Contributor:
John Herschel Project

Herschel10746

From:
Robert Hunt
To:
Sir John Herschel
Date:
[4 February 1843]
Source of text:
RS:HS 10.98
Summary:

Has been reading JH's communication to the P.M. [on solar spectrum] and wishes to point out that RH was the first to carry out those experiments, which are recounted in the P.M. for 1840.

Contributor:
John Herschel Project

Herschel10747

From:
Robert Hunt
To:
Sir John Herschel
Date:
[23 April 1843]
Source of text:
RS:HS 10.99
Summary:

Sends some specimens of photographs he has made by using bichromate of potash and an acid solution of nitrate of mercury. Gives details of a luminous phenomena he has seen in the S.W. and would like an explanation of it from JH.

Contributor:
John Herschel Project

Herschel10748

From:
Robert Hunt
To:
Sir John Herschel
Date:
[24 March 1843]
Source of text:
RS:HS 10.100
Summary:

Enlarging on the luminous phenomena he has seen in the S.W. and giving some comments from a naval officer who had observed it.

Contributor:
John Herschel Project

Herschel10749

From:
Robert Hunt
To:
Sir John Herschel
Date:
[7 June 1843]
Source of text:
RS:HS 10.101
Summary:

Is grateful for the very interesting photograph; will keep the preparation secret if he discovers it. Has been trying many experiments with benzoates with curious results, but bad weather has stopped progress so has now turned to thermography to test the truth of Mr. Prater's conclusions. Comments on these.

Contributor:
John Herschel Project

Herschel1075

From:
Sir John Herschel
To:
N. Spahr
Date:
[20 October 1843]
Source of text:
RS:HS 25.6.19 (draft RAS:JH 3/6.7)
Summary:

Both JH and his wife, Margaret, are very concerned about the health of Madame Gerlach, the aunt of NS. Details are provided.

Contributor:
John Herschel Project

Herschel10750

From:
Robert Hunt
To:
Sir John Herschel
Date:
[6 July 1843]
Source of text:
RS:HS 10.102
Summary:

Enclosing the specimens of photographs by different methods; comments on the methods used. Encloses a paper by Were Fox.

Contributor:
John Herschel Project

Herschel10751

From:
Robert Hunt
To:
Sir John Herschel
Date:
[11 September 1843]
Source of text:
RS:HS 10.103
Summary:

Enclosing specimens of his chromatype; comments on how these were produced and their characteristics. Is very busy with the Annual Exhibition of the Polytechnic Society.

Contributor:
John Herschel Project

Herschel10752

From:
Robert Hunt
To:
Sir John Herschel
Date:
[19 November 1843]
Source of text:
RS:HS 10.104
Summary:

Has received from the P.M. proof of an article replying to the attack of [L. F.] Moser on RH, also details of a new instrument by J. W. Draper. Would like JH's opinion on the instrument. Has had some good results with the fluorates recently.

Contributor:
John Herschel Project

Herschel10753

From:
Robert Hunt
To:
Sir John Herschel
Date:
[12 December 1843]
Source of text:
RS:HS 10.105
Summary:

Would like his views on a name for the combination of hydrogen and chlorine. Comments on the various theories. Has replied to [L. F.] Moser.

Contributor:
John Herschel Project

Herschel10754

From:
Robert Hunt
To:
Sir John Herschel
Date:
[26 January 1844]
Source of text:
RS:HS 10.106
Summary:

Thanks for his instructive letter. Comments on the terms suggested for the chemical change. Has now improved his chromatype process. Unable to continue his researches on light owing to lack of finance.

Contributor:
John Herschel Project
Author
Addressee
Correspondent
Date
Document type
Contributor
Transcription available