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From:
William Herbert, dean of Manchester
To:
John Stevens Henslow
Date:
5 Apr 1839
Source of text:
DAR 185: 63
Summary:

Replies to CD’s questions on plant hybridisation and laws of inheritance. Rejects predominant transmission of characters by established forms. Males show predominance, but congeniality of parents’ constitution to climate and soil more important. No correlation between hybridisation and variability, cultivation, and geographical distribution. Rejects reversion.

Describes experiments in Hippeastrum in which pollen from another species proved more fertile than plant’s own pollen.

Did not intend to say that crossing is inimical to fertility.

Contributor:
Darwin Correspondence Project
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Text Online
From:
William Herbert
To:
J. S. Henslow
Date:
5 April 1839
Source of text:
Cambridge University Library DAR 185: 63
Summary:

No summary available.

Contributor:
Henslow Correspondence Project
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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