From:
Charles Hardy
To:
Charles Robert Darwin
Date:
23 July 1860
Source of text:
DAR 76 (ser. 2): 170
Summary:
CD mistaken, in Origin, p. 73, in saying that only humble-bees visit red clover.
Contributor:
Darwin Correspondence Project
From:
Sir William Pole
To:
Sir John Herschel
Date:
[23 July 1860]
Source of text:
RS:HS 14.25
Summary:
Describes, using a diagram, how the solar protuberances appeared to him as a color-blind person when he observed a solar eclipse.
Contributor:
John Herschel Project