From:
Alfred Russel Wallace
To:
Charles Robert Darwin
Date:
24 Mar [1868]
Source of text:
DAR 106: B61–2, B158–9
Summary:
Returns George Darwin’s criticisms of his notes on sterility and sends further notes in reply. Since there are degrees of sterility between varieties, "is it not probable that natural selection can accumulate these variations?" Varieties that are adapted to new conditions could then survive and form new species without being isolated.
Contributor:
Darwin Correspondence Project
