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To Francis Darwin   3 June [1879]

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.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  3 June [1879]
Classmark:  DAR 211: 25
Letter no:  DCP-LETT-11541

To Francis Darwin   [2 June 1879 or earlier]

Summary

Wants FD to find out what sort of man Ernst Krause is.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  [2 June 1879 or earlier]
Classmark:  DAR 211: 51
Letter no:  DCP-LETT-12076

To Francis Darwin   2 June [1879]

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".

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  2 June [1879]
Classmark:  DAR 271.4: 15
Letter no:  DCP-LETT-12078A

To Francis Darwin   [before 5 June 1879]

Summary

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

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  [before 5 June 1879]
Classmark:  DAR 211: 53
Letter no:  DCP-LETT-12084

To Francis Darwin   6 and 7 June [1879]

Summary

Describes his experiments investigating the geotropic responses of radicles.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  6 and 7 June 1879
Classmark:  DAR 211: 54
Letter no:  DCP-LETT-12091

To Francis Darwin   16 June [1879]

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.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  16 June [1879]
Classmark:  DAR 211: 55
Letter no:  DCP-LETT-12111

To Francis Darwin   24 June [1879]

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.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  24 June [1879]
Classmark:  DAR 271.4: 14
Letter no:  DCP-LETT-12117A

To Francis Darwin   [after 24 June 1879]

Summary

Movement of radicles.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  [after 24 June 1879]
Classmark:  DAR 211: 57
Letter no:  DCP-LETT-12121

To Francis Darwin   25 June [1879]

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.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  25 June [1879]
Classmark:  DAR 211: 56
Letter no:  DCP-LETT-12122

To Francis Darwin   [26 June 1879]

Summary

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

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  [26 June 1879]
Classmark:  DAR 211: 58
Letter no:  DCP-LETT-12124

To Francis Darwin   28 June [1879]

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.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  28 June [1879]
Classmark:  DAR 211: 59
Letter no:  DCP-LETT-12128
Document type
letter (11)
Author
Addressee
Darwin, Francisdisabled_by_default
Correspondent
Date
1879disabled_by_default
06disabled_by_default
02 (2)
03 (1)
05 (1)
06 (1)
16 (1)
24 (2)
25 (1)
26 (1)
28 (1)