From:
John Tyndall
To:
John William Draper
Date:
15th. July | 1863
Source of text:
John William Draper Family Papers, Library of Congress
Summary:
No summary available.
Contributor:
Tyndall Project
No summary available.
Comments on JD's work in photography; JH goes on to talk about JH's ideas of 'chemical' rays of light.
Comments on writings of JD on the chemistry of plants [letter completed 1845-5-7].
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.