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From:
Charles Robert Darwin
To:
Leopold Friedrich August (August) Weismann
Date:
5 Apr 1872
Source of text:
DAR 148: 343
Summary:

Comments on AW’s work [Einfluss der Isolierung (1872)].

Discusses formation of local races.

Conchologist should investigate whether species of same genus vary during successive geological periods.

Comments on Franz Hilgendorf ["Über Planorbis multiformis", Monatsber. K. Preuss. Akad. Wiss. Berlin (1866): 474–504].

Believes sexual selection will be judged a powerful agency.

Contributor:
Darwin Correspondence Project