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Darwin, C. R. in correspondent 
Vines, S. H. in correspondent 
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From:
Charles Robert Darwin
To:
Sydney Howard Vines
Date:
1 Nov 1881
Source of text:
DAR 185: 75
Summary:

Asks SHV about nature of granular matter formed in root cells of Euphorbia peplus which have been placed in solution of ammonium carbonate.

Contributor:
Darwin Correspondence Project
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From:
Sydney Howard Vines
To:
Charles Robert Darwin
Date:
2 Nov [1881]
Source of text:
DAR 180: 6
Summary:

On the action of ammonium carbonate on plant cells. "Aggregation" of protoplasm.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Sydney Howard Vines
Date:
4 Nov 1881
Source of text:
DAR 185: 76
Summary:

Thanks SHV for his letter [13455] in answer to his questions about the action of ammonium carbonate on the root cells of Euphorbia peplus. Suggests further observations.

Has read J. Sachs [Textbook of botany, English translation (1875)] and H. A. De Bary [Vergleichende Anatomie (1877)] on milk-tubes. He believes that tubes he has observed in germinating roots of Euphorbia myrsinites are modified milk tubes. Will send a paper on the subject to the Linnean Society.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Sydney Howard Vines
Date:
15 Nov 1881
Source of text:
DAR 185: 77
Summary:

More observations of the radicles of germinating seeds of Euphorbia peplus for appearance of milk-tubes.

Comments on J. v. Wiesner’s and W. F. P. Pfeffer’s views and criticism of his experiments.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Sydney Howard Vines
Date:
22 Nov 1881
Source of text:
DAR 185: 78
Summary:

Rows of cells with granular matter following treatment with carbonate of ammonia also found in white and young rootlets of common zonal Pelargonium. Differs slightly from Euphorbia in that 2, 3, 4, or 5 rows often adjoin. CD wrong in supposing that these rows of cells were connected with lacticiferous ducts ("milk-tubes"). Root hairs arise exclusively from rows of cells without brownish granular matter. It appears that certain rows of cells with hairs are absorbent and store matter of some kind. This is a new view of the structure and function of rootlets. Francis Darwin will soon set up the salt solution to make the experiment SHV recommends.

Contributor:
Darwin Correspondence Project
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From:
Sydney Howard Vines
To:
Charles Robert Darwin
Date:
24 Nov [1881]
Source of text:
DAR 62: 1
Summary:

Will observe the granular cells in roots, to investigate CD’s observation that root-hairs spring from cells that are not granular. Hopes they may be soluble in [carbonate of ammonia] solution.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Sydney Howard Vines
Date:
27 Nov 1881
Source of text:
DAR 185: 79
Summary:

Describes experiment in which Euphorbia and Drosophyllum roots were exposed to ammonium carbonate solution. Asks SHV’s opinion.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Sydney Howard Vines
Date:
4 Feb 1882
Source of text:
DAR 185: 80
Summary:

CD will put together his notes on the action of carbonate of ammonia on roots in a few days. Asks SHV to send any information he may have, but not to answer if he has none. [See 13666.]

Contributor:
Darwin Correspondence Project
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From:
Sydney Howard Vines
To:
Charles Robert Darwin
Date:
6 Feb 1882
Source of text:
DAR 180: 7
Summary:

On aggregation of protoplasm in root cells.

Is preparing new edition of Sachs [Text-book of botany, morphological and physical, ed. S. H. Vines, 2d ed. (1882)].

Contributor:
Darwin Correspondence Project