Search: Herschel, John in correspondent 
Draper, John William in correspondent 
letter in document-type 
1840-1849::1842 in date 
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Herschel7325

From:
John William Draper
To:
Sir John Herschel
Date:
[26 September 1842]
Source of text:
RS:HS 6.502
Summary:

Sending a Daguerreotype impression of the spectrum. Comments on this. Is publishing a work on the chemical rays.

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
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