From:
Charles Robert Darwin
To:
Josef Popper (Josef Popper-Lynkeus)
Date:
15 Feb 1881
Source of text:
Smithsonian Libraries and Archives (Dibner Library of the History of Science and Technology MSS 405 A. Gift of the Burndy Library)
Summary:
Cannot help JP [with bird-powered flying machine].
Contributor:
Darwin Correspondence Project