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DCP-LETT-6496

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
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DCP-LETT-6455

From:
William Darwin Fox
To:
Charles Robert Darwin
Date:
9 Dec [1868]
Source of text:
DAR 84.1: 126–7, DAR 85: B36–7
Summary:

Hybrid geese.

Proportions of sexes in sheep and cattle.

Pairing habits of crows.

Contributor:
Darwin Correspondence Project

Herschel3186

From:
Sir John Herschel
To:
Patrick Shanahan
Date:
9?] December [1868
Source of text:
RS:HS 17.201
Summary:

To JH's knowledge, PS's Royal Mint position bore no absolute guarantee of permanence unless he had been paying a 'superannuation' fund.

Contributor:
John Herschel Project
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