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
Showing 1–5 of 5 items
Exchanging further information on several aspects of the photographic process [see RH's 1840-4-15].
Thanks RH for a sample of Daguerreotype paper. Comments on some aspects of the action of 'thermic' rays and 'chemical' rays in photography.
Does not know anywhere that such processes as RH uses are used for registry work, although the idea is frequently raised.
Will forward RH's paper to the R.S.L.; intrigued by RH's results using mercury vapor to produce the image on exposed paper.
Hopes that his paper does not anticipate any of RH's work; will share with the R.S.L. any of RH's results. Laments that he is unable to fix the spectral colors on photographic paper. Asks if RH has studied the bromines.