From:
Charles Robert Darwin
To:
George Howard Darwin
Date:
[9 Dec 1868]
Source of text:
DAR 210.1: 6
Summary:
Asks GHD to look in William Thomson’s book [W. Thomson and P. G. Tait, Treatise on natural philosophy, vol. 1 (1867)] to see how many million years ago Thomson says earth’s crust solidified. CD is troubled by "brevity of the world", because pre-Silurian creatures must have lived during endless ages "else my views wd be wrong, which is impossible – Q.E.D.".
Contributor:
Darwin Correspondence Project
