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John Herschel Project in contributor 
1840-1849::1842::12 in date 
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Herschel1672

From:
Alfred Smee
To:
Sir John Herschel
Date:
[2 December 1842]
Source of text:
RS:HS 16.158
Summary:

About chemical solutions used in photography, and problems produced by impurities in photographic paper.

Contributor:
John Herschel Project

Herschel3948

From:
Sir John Herschel
To:
Robert Hunt
Date:
[2 December 1842]
Source of text:
George Eastman House, 11.17 (C: RS:HS 22.143)
Summary:

Sends RH a packet of photographs with a description of each type.

Contributor:
John Herschel Project

Herschel1122

From:
Sir John Herschel
To:
Charles Wheatstone
Date:
[4 December 1842]
Source of text:
RS:HS 25.11.4
Summary:

Sends CW a specimen of JH's 'mercurial photographic process.' JH is pleased that W. H. Fox Talbot received the Rumford medal.

Contributor:
John Herschel Project

Herschel1073

From:
Sir John Herschel
To:
John William Draper
Date:
[5 December 1842]
Source of text:
RS:HS 25.6.16
Summary:

Comments on JD's work in photography; JH goes on to talk about JH's ideas of 'chemical' rays of light.

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

Herschel3848

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[8 December 1842]
Source of text:
unknown
Summary:

Finished the reductions of all of the nebulae and double stars recorded at Cape Town; JH soon hopes to prepare for the publication of his Cape Results.

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

Herschel4339

From:
Richard Taylor
To:
Sir John Herschel
Date:
[10 December 1842]
Source of text:
RS:HS 17.339
Summary:

Asks for advice on a number of scientific papers.

Contributor:
John Herschel Project

Herschel4014

From:
Sir John Herschel
To:
Robert Hunt
Date:
12?] December [1842
Source of text:
George Eastman House, 6.17
Summary:

Read John William Draper's papers; although he believes that Draper's instruments are inconsistent, JH feels that they are still important because they are measurable. Decries [L. F.] Moser's skepticism of photography's value, calling it a 'blindfolding to some of the most interesting physical relations that have ever been discovered.'

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

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

Herschel13814

From:
George Dollond
To:
Sir John Herschel
Date:
[19 December 1842]
Source of text:
TxU:H/M-0164; Reel 1087
Summary:

Papers arrived safely. Will report GD's opinion on these soon.

Contributor:
John Herschel Project

Herschel1673

From:
Alfred Smee
To:
Sir John Herschel
Date:
[22 December 1842]
Source of text:
RS:HS 16.159
Summary:

Thanks JH for a specimen of 'mercury type,' which AS describes as he examined it under a microscope.

Contributor:
John Herschel Project

Herschel4206

From:
Richard Taylor
To:
Sir John Herschel
Date:
[22 December 1842]
Source of text:
RS:HS 17.340
Summary:

Discusses matter touching P.M. and Scientific Memoirs.

Contributor:
John Herschel Project

Herschel13815

From:
George Dollond
To:
Sir John Herschel
Date:
[23 December 1842]
Source of text:
TxU:H/M-0165; Reel 1087
Summary:

Sees too many difficulties in optics of JH's proposed telescope. Can build mechanical portion, but not by March as JH requires. Cannot give estimate, because design is too novel.

Contributor:
John Herschel Project

Herschel8653

From:
Sir John Herschel
To:
[John Frederick Goddard?]
Date:
[23 December 1842]
Source of text:
Manchester Central Library
Summary:

JH mislaid the request for specimens of photography, but now sends them; describes those sent. Explains how to get a copy of JH's paper on photography.

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

Herschel11641

From:
John McClelland
To:
Sir John Herschel
Date:
[25 December 1842]
Source of text:
RS:HS 12.6
Summary:

Sending, care of Dr. Grant, the first part of a series of experiments on the magnetic influence of light, which appeared recently in the Calcutta Journal. Has been unable to obtain a characteristic specimen of Kankar in Bengal. Dr. Hugh Falconer is an expert on the Kankar in Bengal and he will try to obtain information from Falconer.

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

Herschel13816

From:
George Dollond
To:
Sir John Herschel
Date:
[27 December 1842]
Source of text:
TxU:H/M-0166; Reel 1087
Summary:

Will begin building components that JH identified as most immediately needed. Confirm scale of JH's drawings. Will send samples of prism glass for JH to inspect. Cannot yet estimate cost.

Contributor:
John Herschel Project
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