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1870-1879 in date 
Darwin, C. R. in author 
Darwin, Francis in addressee 
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Showing 8194 of 94 items

From:
Charles Robert Darwin
To:
Francis Darwin
Date:
3 June [1879]
Source of text:
DAR 211: 25
Summary:

Asks whether canary grass and oats have chlorophyll in their cotyledons.

Has been working hard at circumnutation of leaves to see whether sleep movements are exaggerated circumnutation.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[before 5 June 1879]
Source of text:
DAR 211: 53
Summary:

Believes that he will prove that the tip of radicle is the brain as far as geotropism is concerned.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
6 and 7 June 1879
Source of text:
DAR 211: 54
Summary:

Describes his experiments investigating the geotropic responses of radicles.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
16 June [1879]
Source of text:
DAR 211: 55
Summary:

Has given his reasons for believing that twisting of stem is related to circumnutation in Climbing plants.

Tells results of experiments on movement of cotyledons and radicles.

Is getting aerial heliotropic roots from Kew.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
24 June [1879]
Source of text:
DAR 271.4: 14
Summary:

Movement in plants: Philodendron and Dendrobium.

Will go to London on Thursday to receive Baly Medal. Laura Forster has offered them her house in London.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[after 24 June 1879]
Source of text:
DAR 211: 57
Summary:

Movement of radicles.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
25 June [1879]
Source of text:
DAR 211: 56
Summary:

Suggests experiments to test the response of radicles to light. Considers an alternative term for heliotropism.

Will be curious to have FD’s spiral theory about circumnutation explained to him.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[26 June 1879]
Source of text:
DAR 211: 58
Summary:

Believes that the response of root tips to being "blinded" with foil is much more interesting than response to cauterisation.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
28 June [1879]
Source of text:
DAR 211: 59
Summary:

Discusses the movements of radicles. His observations show that sensitivity to touch resides in the root tip and he believes that sensitivity to gravity governing geotropic responses is also in the root tip. Would much like to convert Julius von Sachs to his ideas on radicle movement.

Contributor:
Darwin Correspondence Project
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
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
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
4 July [1879]
Source of text:
DAR 271.4: 16
Summary:

CD gives suggestions concerning FD’s experiments on the radicles of roots. Asks him to find out whether J. von Sachs tried beans. Should also try other gramineous plants.

Bernard looking forward to his father’s return.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
12 July [1879]
Source of text:
DAR 211: 62
Summary:

Notes observations on sensitivity and movement of radicles.

Has finished chapter [of Movement in plants] on sleeping plants and is now looking over heliotropism notes.

Is perplexed by Erasmus Darwin; Erasmus [A. Darwin] likes it, but Henrietta thinks it much too long.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[2 Aug 1879]
Source of text:
DAR 211: 63
Summary:

Tells arrangements for their journey to Coniston.

Contributor:
Darwin Correspondence Project