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From:
Charles Robert Darwin
To:
Athenæum
Date:
7 [July] 1869
Source of text:
Athenæum , 17 July 1869, p. 82
Summary:

Because readers have arrived at different answers to the problem of the rate of increase of elephants, CD offers a rule, used by his son George, for calculating the product for any number of generations.

[Letter erroneously dated June.]

Contributor:
Darwin Correspondence Project
From:
Edward Lacy Garbett
To:
Athenæum
Date:
19 July 1869
Source of text:
Athenæum , 24 July 1869, p. 115
Summary:

More on the problem of the increase of elephants (see 6806f and 6820).

Contributor:
Darwin Correspondence Project