From:
Peter Martyn
To:
Sir John Herschel
Date:
[1 September 1865]
Source of text:
RS:HS 13.23
Summary:
Is now reading JH's article on Light in the May number of Good Words. Gives his own physiological and phrenological cause of color blindness and cites an example in the Rev. F. Drew.
Contributor:
John Herschel Project