From:
Sir John Herschel
To:
Alexander von Humboldt
Date:
[11 February 1850]
Source of text:
RS:HS 23.84
Summary:
Answers questions raised by AH in his 1850-1-19 [letter contains notes made by AH].
Contributor:
John Herschel Project
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Answers questions raised by AH in his 1850-1-19 [letter contains notes made by AH].