Search: 1840-1849::1842::12 in date 
letter in document-type 
Sorted by:

Showing 21–40 of 49 items

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

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

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

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

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

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

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

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

Herschel2173

From:
Samuel Rogers
To:
Sir John Herschel
Date:
[29 December 1842]
Source of text:
RS:HS 14.418
Summary:

Thanks JH for the poem [JH's translation of Friedrich Schiller's 'The Walk'] he sent. Requests a song sung by 'faery elves' in William Herschel's telescope.

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

Herschel3864

From:
William Rowan Hamilton
To:
Sir John Herschel
Date:
[30 December 1842]
Source of text:
unknown
Summary:

Thanks JH for JH's translation of Friederich Schiller's poem 'The Walk.'

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

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

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

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

Herschel5896

From:
Joanna Baillie
To:
Sir John Herschel
Date:
[30 December 1842]
Source of text:
RS:HS 3.21
Summary:

Thanks for JH's translation of Frederick Schiller's poem. Hopes that they had a pleasant Christmas. Family news.

Contributor:
John Herschel Project

Herschel6888

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[30 December 1842]
Source of text:
RS:HS 6.188
Summary:

Thanks for his reductions of Schiller's observations. Many people believe the claims made in the 'Moon Hoax'. Is writing a book on the use of the globes.

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
Author
Addressee
Correspondent
Date
Document type
Repository
Contributor
Transcription available