From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[2 June 1879 or earlier]
Source of text:
DAR 211: 51
Summary:
Wants FD to find out what sort of man Ernst Krause is.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
2 June [1879]
Source of text:
DAR 271.4: 15
Summary:
Thanks for FD’s letter describing microscopic work under experienced supervision.
Is glad to hear of C. E. Stahl’s objection to treating plants as mere machines.
Pleased that J. von Sachs has yielded on growth.
Perhaps Stahl will recognise whether the case of the silver fir is the same as that referred to in the German account [see 12074b].
CD has finished the first draft of his essay on Erasmus Darwin’s life and is "heartily sick of the job".
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[after 2 June 1879]
Source of text:
DAR 209.5: 230–2
Summary:
Geotropism.
Experimenting on Porlieria in damp and dry earth.
Hermann Müller has been ridiculed for teaching children "in the beginning was Carbon".
Will ask about Ernst Krause.
Contributor:
Darwin Correspondence Project
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:
Francis Darwin
To:
Charles Robert Darwin
Date:
[after 16 June 1879]
Source of text:
DAR 274.1: 53
Summary:
Reports on roots and climbing plants experiments he is performing in Sachs’ laboratory. Orchids with air roots have come. Goebel says proshelic better than helic.
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:
Francis Darwin
To:
Charles Robert Darwin
Date:
[before 26 June 1879]
Source of text:
DAR 274.1: 55
Summary:
Discusses results of geotropism experiment. Has started some heliotropic caustic experiments on mustard roots. Has trouble making marks.
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:
Francis Darwin
To:
Emma Wedgwood; Emma Darwin
Date:
30 June 1879
Source of text:
DAR 274.1: 49
Summary:
Last night had tremendous thunderstorm. Will ask Goebel about proshelismus. Describes experiments on beans. Please send Bessy’s address. Has got to know nice Englishman named Purdy and his wife. Bathes nearly every night with the Finlander.
Contributor:
Darwin Correspondence Project