From:
Sir John Herschel
To:
John William Draper
Date:
[7 May 1845]
Source of text:
RS:HS 19.117
Summary:
Critiques JD's paper on plant chemistry, contrasting 'luminous, colorific, calorific, & chemical or photographic' rays. Physics of light. [Letter continues two months later.] JH is done with photography. Has no desire to claim priorities in that field. Entrusts future to JD and others.
Contributor:
John Herschel Project