Summary

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

Summary

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

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

Describes bean experiments. Will tell Emma Darwin to tell Elizabeth Darwin that he has written to the Riffel.

Summary

Discusses results of geotropism experiment. Has started some heliotropic caustic experiments on mustard roots. Has trouble making marks.

Summary

Pressure paralyses the streaming of protoplasm in the hairs of Tradescantia.

Summary

Heliotropism nomenclature. Apheliotropic mustard roots grow more quickly in dark. Measures growth with microscope as S. H. Vines did in mould. Studying air roots.

FD’s and Stahl’s negative opinion of Sachs.

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

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

Discusses Müller-Thurgau’s work on heliotropism. Will start on Thursday for Heidelberg and Strassburg.

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

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

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

Is increasing FD’s allowance.

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

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

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

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

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.