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Darwin, C. R. in correspondent 
Berkeley, M. J. in correspondent 
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From:
Charles Robert Darwin
To:
Miles Joseph Berkeley
Date:
7 Apr [1855]
Source of text:
Shropshire Archives (SA 6001/134/41)
Summary:

Asks for a pea variety for an experiment.

Discusses C. F. v. Gärtner’s results [in Bastarderzeugung im Pflanzenreich (1849)]. Criticises Gärtner’s belief that hybrids are always less fertile than their parents.

Asks about MJB’s experiments.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Miles Joseph Berkeley
Date:
11 Apr [1855]
Source of text:
Shropshire Archives (SA 6001/134/42)
Summary:

Thanks MJB for peas.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Miles Joseph Berkeley
Date:
12 June [1855]
Source of text:
Shropshire Archives (SA 6001/134/43)
Summary:

Thanks for approval of seed-soaking experiments in Gardeners’ Chronicle ["Does sea-water kill seeds?", 26 May 1855; Collected papers 1: 255–8]. They seem not to have convinced Hooker of consequences for geographical distribution.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Miles Joseph Berkeley
Date:
3 July [1855]
Source of text:
Shropshire Archives (SA 6001/134/44)
Summary:

Reports success of seed-soaking experiments. Celery and onion germinate after 85 days’ immersion.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Miles Joseph Berkeley
Date:
29 Feb [1856]
Source of text:
Shropshire Archives (SA 6001/134/45)
Summary:

Preparing paper on seed-soaking for Linnean Society ["Action of sea-water on seeds", Collected papers 1: 264–73]. Wants to use MJB’s results. Lost ardour when he found seeds would not float.

Has grown MJB’s purest pea seeds and got a few variants. Gärtner’s experiments suggest direct action of pollen, but CD thinks it is "mere variation".

Contributor:
Darwin Correspondence Project
From:
Miles Joseph Berkeley
To:
Charles Robert Darwin
Date:
7 Mar 1856
Source of text:
DAR 160: 174
Summary:

Reports on breeding experiments with various seeds: corn, aubergine, kidney beans, sugar-peas. Speculates that cause of changes in seed colour in sugar-peas may be mere variation rather than result of impregnation.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Miles Joseph Berkeley
Date:
18 Mar [1856]
Source of text:
Joseph R. Sakmyster, ADS Autographs (dealer) (no date)
Summary:

Thanks MJB for information which he is including in his article for the Linnean Society.

Refers to the peas "which produce the black or intensely purple pods". [See 1834 and 1836.]

Contributor:
Darwin Correspondence Project