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From:
Ferdinand von Mueller
To:
Asa Gray
Date:
8 December 1872
Source of text:
Gray Herbarium Archives, Harvard University, Cambridge, Massachusetts
Summary:

No summary available.

Contributor:
Correspondence of Ferdinand von Mueller Project
From:
Alpheus Hyatt
To:
Charles Robert Darwin
Date:
8 Dec 1872
Source of text:
DAR 145: 365
Summary:

Discusses his theory of acceleration and retardation of development.

Contributor:
Darwin Correspondence Project