From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[1878?]
Source of text:
DAR 211: 21
Summary:
Forwards an unspecified work for FD to read.
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[after 28 Feb 1878]
Source of text:
DAR 274.1: 46
Summary:
He is getting some of the Heracleum seed sowed and the Cycas planted. Does CD want anything done with the potatoes sent by James Torbitt?
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[11 May 1878]
Source of text:
DAR 211: 23
Summary:
Julius von Sachs will "swear & curse" when he finds out he has missed sensitiveness of root apex. Has been putting his notes together and the case is conclusive. [Dated "Saturday 10th" by CD.]
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[12 May 1878]
Source of text:
DAR 274.1: 47
Summary:
Thanks for sending Nature; plans to leave on 22 May; anecdote about Bernard.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[13–26 May 1878]
Source of text:
DAR 211: 26
Summary:
Has had conflicting information on the movement of radicles; wants FD to experiment with them.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
5 [June 1878]
Source of text:
DAR 211: 22
Summary:
Sends letter and seeds from [F. J. Cohn].
Is working too hard.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
18 June [1878]
Source of text:
DAR 211: 27
Summary:
Has been observing the movements of leaves and cotyledons; sleep movements are exaggerated circumnutation. Reports some odd observations on movement in Oxalis species.
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[22 June 1878]
Source of text:
DAR 274.1: 51
Summary:
Describes his talk with Julius von Sachs about canary-grass.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
[c. 23 June 1878]
Source of text:
DAR 211: 28
Summary:
Can send FD twisted branches of some climbing plants if he wishes.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
26 June [1878]
Source of text:
DAR 211: 29–30
Summary:
Asks questions related to movement in plants. The cotyledons of Oxalis offer a promising field for study.
Wonders why Julius von Sachs thinks bloom is a protection against insects.
Encloses notes on the cotyledons of Oxalis species.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
29 [June 1878]
Source of text:
DAR 211: 31
Summary:
Will dispatch the best twisted stems he can find.
Considers the role of the pulvinus in leaf movement.
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[29 June] 1878
Source of text:
DAR 209.14: 181
Summary:
Sleep of Porlieria hygrometrica seems independent of light.
Will have lots of time for oats. W. F. P. Pfeffer’s point is that there is no growth in sleepers with joints. A. F. Batalin says there is a slight growth.
[Dated Saturday 28th by FD.]
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
2 July [1878]
Source of text:
DAR 211: 32
Summary:
Suggests FD call on Carl Semper.
Inquires about Porlieria: Do the leaves shut to check evaporation? Does it appear silver under water?
Explains how he thinks the pulvinus acts; wishes FD would investigate the point.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
6 [July 1878]
Source of text:
DAR 211: 33
Summary:
Has a magnificent bush of Porlieria. There is no vestige of bloom; CD will test for sleep movements. Reports successful experiments on temperature-induced sensitivity of radicles.
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[before 7 July 1878]
Source of text:
DAR 274.1: 57
Summary:
He has been talking to Julius von Sachs about sleeping plants that move with and without growth.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
7 [July 1878]
Source of text:
DAR 211: 34
Summary:
Describes sleep movements in Porlieria and his experiments on movements of radicles.
Thalia flowers have interesting mechanism to ensure cross-fertilisation.
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[after 7 July 1878]
Source of text:
DAR 209.7: 157
Summary:
Sleep in Porlieria studied.
Oats begin germinating.
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[12 July 1878]
Source of text:
DAR 209.1: 156–7, DAR 209.14: 88
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.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Francis Darwin
Date:
14 July [1878]
Source of text:
DAR 211: 35, 36, 39
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.
Contributor:
Darwin Correspondence Project
From:
Francis Darwin
To:
Charles Robert Darwin
Date:
[after 14 July 1878]
Source of text:
DAR 274.1: 48
Summary:
Thinks it would be a good idea to give the typing machine to Karl Semper.
Contributor:
Darwin Correspondence Project