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 |