From:
Hugh Falconer
To:
Charles Robert Darwin
Date:
9 Jan 1863
Source of text:
DAR 164: 12
Summary:
Answers CD’s query on the free digits of Archaeopteryx.
Contributor:
Darwin Correspondence Project
From:
William H. Callcott
To:
Sir John Herschel
Date:
[9 January 1863]
Source of text:
RS:HS 5.142
Summary:
Is grateful for his reply. Where can he find a statement of Isaac Newton regarding the relationship between colors and music?
Contributor:
John Herschel Project