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1830-1839::1839::06 in date 
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From:
Charles Robert Darwin
To:
William Herbert, dean of Manchester
Date:
26 June 1839
Source of text:
DAR 185: 65–6
Summary:

CD is led to believe there are no true permanently inbreeding, sexually reproducing beings. Thanks for replies to breeding questions.

Asks for clarification of Hippeastrum crosses: is selfing or crossing with individual of same species intended and was increased fertility due to constitution of foreign parent or due to the pollen coming from another plant? Has WH known any hybrid or mongrel to revert or to vary in a manner unlikely to be effect of soil?

Sends Journal of researches.

Contributor:
Darwin Correspondence Project
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From:
William Herbert, dean of Manchester
To:
Charles Robert Darwin
Date:
[c. 27 June 1839]
Source of text:
DAR 185: 67
Summary:

Rejects necessity of outbreeding and any general law of reversion.

Describes further experiments with Hippeastrum showing greater fertility with foreign pollen than with individual’s own pollen or with pollen from another individual of same species.

Does not believe CD’s questions about reversion can be answered in present state of knowledge.

Contributor:
Darwin Correspondence Project
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