From Francis Darwin [after 7 July 1878]
Summary
Sleep in Porlieria studied.
Oats begin germinating.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [after 7 July 1878] |
Classmark: | DAR 209.7: 157 |
Letter no: | DCP-LETT-11596 |
From Francis Darwin [12 July 1878]
Summary
Chlorophyll development in oat seedling.
Lists the sleeping plants he has seen.
Julius Sachs thinks Hugo de Vries has not cleared up everything [about climbing plants]. But Sachs has not worked on the mechanical problem.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [12 July 1878] |
Classmark: | DAR 209.1: 156–7, DAR 209.14: 88 |
Letter no: | DCP-LETT-11604 |
To Francis Darwin 14 July [1878]
Summary
Asks for list of families of sleeping plants. Believes sleep is merely modified circumnutation at a particular time of day.
Porlieria has had no water for some time but shows no sign of flagging.
Describes the response of Thalia flowers to touch.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 14 July [1878] |
Classmark: | DAR 211: 35, 36, 39 |
Letter no: | DCP-LETT-11608 |
From Francis Darwin [before 17 July 1878]
Summary
More sleepers from green-house.
Julius Sachs’s view of climbing plants: he distinguishes between nutation to find a support and growth after support is found.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [before 17 July 1878] |
Classmark: | DAR 209.1: 155; DAR 274.1: 50, 52 |
Letter no: | DCP-LETT-11613 |
To Francis Darwin 17 July [1878]
Summary
Discusses sleep movements of Porlieria.
Has read an abstract of Julius Wiesner on heliotropism and geotropism ["Die heliotropischen Erscheinungen im Pflanzenreiche", Anz. Kais. Akad. Wiss. Wien 15 (1878): 137–40] which seems important but is puzzling.
Gives details of his observations on climbing plants with reference to comments by Julius Sachs.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 17 July [1878] |
Classmark: | DAR 211: 37 |
Letter no: | DCP-LETT-11615 |
To Francis Darwin 20 [July 1878]
Summary
Has offered Carl Semper the writing machine.
Speculates on the mechanism of movement in plants and their reception of and response to stimuli.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 20 [July 1878] |
Classmark: | DAR 211: 38 |
Letter no: | DCP-LETT-11620 |
To Francis Darwin [20? July 1878]
Summary
Horace Darwin suggests FD water the Porlieria copiously to see whether it will keep awake all day.
[Possibly P.S. to 11620.]
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | [20? July 1878] |
Classmark: | DAR 211: 39 |
Letter no: | DCP-LETT-11621 |
From Francis Darwin [21 July 1878]
Summary
Has been investigating nutational movements of climbing plants; comments on the opinions of Julius von Wiesner and Julius Sachs. Remarks on the sleep movements of certain plants and the mechanism of tendril curvature. Is experimenting with Porlieria.
Has visited K. G. Semper’s laboratory.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [21 July 1878] |
Classmark: | DAR 162: 59, DAR 209.8: 151 |
Letter no: | DCP-LETT-11623 |
From Francis Darwin 24 and 25 July 1878
Summary
Notes Julius Sachs’s opinion on the heliotropism of moulds: he can see no use in the response.
C. E. Stahl is working on swarm spores which can be made both helio- and apheliotropic.
Sachs has told him that some ferns sleep, and he suspects that some grasses may move.
Sachs also feels they may be working at bloom from a wrong point of view and suggests leaves may need to keep dry in order to keep their stomata open.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | 24 and 25 July 1878 |
Classmark: | DAR 162: 60, DAR 209.6: 198 |
Letter no: | DCP-LETT-11628 |
To Francis Darwin 25 July [1878]
Summary
Is forwarding the writing machine to Carl Semper.
Is glad FD has taken up his old friends, the twiners.
Hopes to get heliotropic aerial roots from J. D. Hooker. Asks FD to find out whether any moulds or roots are apheliotropic. Is puzzled by heliotropism in subterranean roots.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 25 July [1878] |
Classmark: | DAR 211: 40 |
Letter no: | DCP-LETT-11631 |
From Francis Darwin [4–7 August 1878]
Summary
Experiments on effects of removing "bloom" from leaves and fruit.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [4–7 Aug 1878] |
Classmark: | DAR 162: 57 |
Letter no: | DCP-LETT-11632 |
To Francis Darwin 30 July [1878]
Summary
Comments on function of bloom.
Describes the effect of water shortage on sleep movements in Porlieria.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 30 July [1878] |
Classmark: | DAR 211: 41 |
Letter no: | DCP-LETT-11635 |
From Francis Darwin [before 3 August 1878]
Summary
Sachs jumps to the conclusion twiners and tendrils are similar from the Menispermum that twined without a stick. Akebia grows down a stick; not only the free end is involved.
Sleeping plants.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [before 3 Aug 1878] |
Classmark: | DAR 209.8: 152 |
Letter no: | DCP-LETT-11638 |
To Francis Darwin 3 August [1878]
Summary
Is pleased FD’s climbing work goes well.
Thanks him for information on heliotropism.
Discusses sleep movements
and his observations on the sensitivity of radicle tips.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 3 Aug [1878] |
Classmark: | DAR 211: 42 |
Letter no: | DCP-LETT-11639 |
To Francis Darwin 14 [August 1878]
Summary
Instructs FD to plant some Oxalis seeds.
Wishes to trace the movement of an old cotyledon. Asks him to examine and compare the pulvinus of a species which moves its cotyledon greatly with one of a species that moves it only moderately.
Are the tendrils ready for heliotropic experiment yet?
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 14 [Aug 1878] |
Classmark: | DAR 211: 43 |
Letter no: | DCP-LETT-11658 |
To Francis Darwin [17 August 1878]
Summary
Instructions to sow some seeds
and suggestions for experiment on effects of removal of bloom.
Likes Hugo de Vries very much; has hardly ever seen so modest a man.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | [17 Aug 1878] |
Classmark: | DAR 211: 44 |
Letter no: | DCP-LETT-11668 |
To Francis Darwin [19 August 1878]
Summary
Asks FD to reply to a letter [11653a] requesting a list of CD’s books.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | [19 Aug 1878] |
Classmark: | DAR 271.2: 4v |
Letter no: | DCP-LETT-11669 |
From Francis Darwin [after August 1878]
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [after Aug 1878] |
Classmark: | DAR 209.14: 33 |
Letter no: | DCP-LETT-11683 |
To Francis Darwin 12 September [1878]
Summary
Julius von Sachs’s views on stomata seem largely correct, but CD cannot understand how leaves can survive submerged for such long periods.
Has been observing Drosera and concludes that none of the movement of the tentacles is caused by growth.
Suggests observations to show role of pulvinus in leaf movement.
Author: | Charles Robert Darwin |
Addressee: | Francis Darwin |
Date: | 12 Sept [1878] |
Classmark: | DAR 211: 45 |
Letter no: | DCP-LETT-11690 |
From Francis Darwin [12 September 1878]
Summary
He has been working hard at Kew for two days.
Author: | Francis Darwin |
Addressee: | Charles Robert Darwin |
Date: | [12 Sept 1878] |
Classmark: | DAR 274.1: 44 |
Letter no: | DCP-LETT-11690F |
Darwin, C. R. | (141) |
Darwin, Francis | (130) |
Rogers, J. I. | (4) |
Butler, Samuel (b) | (3) |
Darwin, Amy | (2) |
Darwin, Francis | (162) |
Darwin, C. R. | (98) |
Darwin, Elizabeth | (7) |
Darwin, G. H. | (7) |
Darwin, H. E. | (7) |
Darwin, Francis | (292) |
Darwin, C. R. | (239) |
Darwin, Horace | (9) |
Darwin, Leonard | (9) |
Darwin, Elizabeth | (8) |