Sends drawings of specimens [of Thalia] CD requested.

Thanks GHD for his drawings [of Thalia]. Some parts need attention.

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.

Writes to say that the point on which he thought GHD’s drawings were mistaken proves to be an error in his own observation.

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.

Has found examples of small female flowers in Stachys germanica and Ranunculus bulbosus.

Sends specimens.

Sensitive plants.

More sleepers from green-house.

Julius Sachs’s view of climbing plants: he distinguishes between nutation to find a support and growth after support is found.

Discusses sleep movements of Porlieria.

Has read an abstract of Julius Wiesner on heliotropism and geotropism ["Die heliotropischen Erscheinungen im Pflanzenreiche", Anz. Kais. Akad. Wiss. Wien 15 (1878): 137–40] which seems important but is puzzling.

Gives details of his observations on climbing plants with reference to comments by Julius Sachs.

Informs CD that certain cash from U. S. investments does not have income tax deducted.

Has offered Carl Semper the writing machine.

Speculates on the mechanism of movement in plants and their reception of and response to stimuli.

Thanks CD for his kind letter and accepts his offer of a writing machine.

Thanks CD for his condolences. Reminisces about their youth.

On the death of his naturalist friend, W. C. Hewitson.

Idea has struck him that might be of use to CD: that rapid changes during growth as in some plants and in insect metamorphosis may bear analogy to the slower changes resulting in the formation of new varieties.

Is forwarding the writing machine to Carl Semper.

Is glad FD has taken up his old friends, the twiners.

Hopes to get heliotropic aerial roots from J. D. Hooker. Asks FD to find out whether any moulds or roots are apheliotropic. Is puzzled by heliotropism in subterranean roots.

CD named corresponding member of the Royal Bavarian Academy of Science. [See 11634.]

Explains that it was his son, Grant, who sent JAA’s article defending Darwinian origins of morality.

Comments on CD’s Canadian admirers

and asks whether Grant may visit CD at Down.

Comments on function of bloom.

Describes the effect of water shortage on sleep movements in Porlieria.

Burdened with Anniversary Address to the Royal Society.

Quips that even Huxley is running out of speeches.

She and her father will not be idle working on worms for CD.