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

Requests some seeds.

Believes the leaves of Phyllanthus sleep like those of Cassia.

Summary

Discusses A. B. Frank’s views [Beiträge zur Pflanzenphysiologie (1868)] on how plants position themselves; differences and similarities compared with their own conclusions.

Summary

CD cannot find his pincers and other tools for microscopical dissection. Does FD know where he should look?

Hopes FD will feel better after "so complete a change" [trip to North Africa].

Sends his love to George.

Bernard gets more charming every day.

CD has been put on a committee for a memorial fund for W. K. Clifford.

Summary

Directs CD where to find tools in his room. Has been looking at agave and aloe flowers. Thanks family for their letters.

Summary

Is increasing FD’s allowance.

Has begun his chapter on sleep of plants [for Movement in plants].

Summary

Astonished at circular and will risk revolutions to invest. Describes Blidah, Algeria.

Summary

Fungus is an Aecidium. Porliera, Anthuriums and Aroids will hopefully sprout if weather gets hot. Sachs has changed his ideas about the cause of heliotropism. Describes men he is sharing a lab with.

Summary

Try to find and read [a German] account of the fir-trees affected by some fungus which produces upright shoots. CD wants to know whether the case is same as what he has observed in the silver fir. Includes diagram.

Summary

Geotropism.

Experimenting on Porlieria in damp and dry earth.

Hermann Müller has been ridiculed for teaching children "in the beginning was Carbon".

Will ask about Ernst Krause.

Summary

Wants FD to find out what sort of man Ernst Krause is.

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".

Summary

Believes that he will prove that the tip of radicle is the brain as far as geotropism is concerned.

Summary

Describes his experiments investigating the geotropic responses of radicles.

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.

Summary

Reports on roots and climbing plants experiments he is performing in Sachs’ laboratory. Orchids with air roots have come. Goebel says proshelic better than helic.

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.

Summary

Movement of radicles.

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.

Summary

Believes that the response of root tips to being "blinded" with foil is much more interesting than response to cauterisation.