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DCP-LETT-12132

From:
Charles Robert Darwin
To:
Francis Darwin
Date:
2 July [1879]
Source of text:
DAR 211: 61
Summary:

FD’s experiment shows that caustic does not interfere with the bending of radicles. Believes that the apex is a kind of brain for certain movements, being specialised to receive certain irritations.

Contributor:
Darwin Correspondence Project

DCP-LETT-12133

From:
Charles Robert Darwin
To:
Francis Darwin
Date:
2 July [1879]
Source of text:
DAR 211: 60
Summary:

Stresses importance of ensuring that cauterisation of radicles does not, through injury, prevent movement. Plans an experiment to test for "apheliotropism" in certain radicles.

Contributor:
Darwin Correspondence Project
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