Showing 61–80 of 210 items
The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
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.]
Thanks for sending Nature; plans to leave on 22 May; anecdote about Bernard.
A report has arrived for FD which CD will forward.
Regrets that the arrangement to visit Down must be for Friday.
Has had conflicting information on the movement of radicles; wants FD to experiment with them.
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.
Suggests sensitive plants that close at night would be protected from nocturnal-feeding snails. JIR’s brother in India says snails occur there in abundance.
Thinks it would be a good idea to give the typing machine to Karl Semper.
Has been observing the movements of leaves and cotyledons; sleep movements are exaggerated circumnutation. Reports some odd observations on movement in Oxalis species.
Can send FD twisted branches of some climbing plants if he wishes.
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.
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.]
Will dispatch the best twisted stems he can find.
Considers the role of the pulvinus in leaf movement.
JIR’s brother writes from India in support of the protective function of plant sensitivity.
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.
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.
He has been talking to Julius von Sachs about sleeping plants that move with and without growth.
Describes sleep movements in Porlieria and his experiments on movements of radicles.
Thalia flowers have interesting mechanism to ensure cross-fertilisation.
Sleep in Porlieria studied.
Oats begin germinating.
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.
