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.]

Summary

Thanks for sending Nature; plans to leave on 22 May; anecdote about Bernard.

Summary

A report has arrived for FD which CD will forward.

Summary

Regrets that the arrangement to visit Down must be for Friday.

Summary

Has had conflicting information on the movement of radicles; wants FD to experiment with them.

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.

Summary

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.

Summary

Thinks it would be a good idea to give the typing machine to Karl Semper.

Summary

Has been observing the movements of leaves and cotyledons; sleep movements are exaggerated circumnutation. Reports some odd observations on movement in Oxalis species.

Summary

Can send FD twisted branches of some climbing plants if he wishes.

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.

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.]

Summary

Will dispatch the best twisted stems he can find.

Considers the role of the pulvinus in leaf movement.

Summary

Reports observations on day and night movement in Porlieria.

Summary

Thanks for list of sleepers.

Thinks it would be a good idea to give writing machine to Carl Semper.

Summary

JIR’s brother writes from India in support of the protective function of plant sensitivity.

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.

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.

Summary

He has been talking to Julius von Sachs about sleeping plants that move with and without growth.

Summary

Describes sleep movements in Porlieria and his experiments on movements of radicles.

Thalia flowers have interesting mechanism to ensure cross-fertilisation.