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DCP-LETT-11900

From:
Hugo de Vries
To:
Charles Robert Darwin
Date:
24 Feb 1879
Source of text:
DAR 209.3: 336
Summary:

Did not wish to imply that some leaves are insensitive to light, only that he could not measure their sensitivity. Contraction of roots seems common.

Contributor:
Darwin Correspondence Project

DCP-LETT-12186

From:
Hugo de Vries
To:
Charles Robert Darwin
Date:
7 Aug 1879
Source of text:
DAR 180: 22
Summary:

Experiments to determine mechanism of tendril curvature; importance of variations in cell turgidity. Contraction in roots caused by increased turgor.

Contributor:
Darwin Correspondence Project

DCP-LETT-12213

From:
Hugo de Vries
To:
Charles Robert Darwin
Date:
2 Sept 1879
Source of text:
DAR 180: 23
Summary:

Force of turgor is true cause of movement in plants. HdeV hopes to identify the substance which increases the cell’s water-absorbing power.

Contributor:
Darwin Correspondence Project

DCP-LETT-12223

From:
Hugo de Vries
To:
Charles Robert Darwin
Date:
10 Sept 1879
Source of text:
DAR 180: 24
Summary:

Movement of tentacles of Drosera.

Contributor:
Darwin Correspondence Project
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