Ernst Haeckel wants to go to Ceylon to examine Medusae and Radiolariae, CD has offered him £100.

Is working on revises of Earthworms.

Has seen a pied flycatcher for the first time.

Discusses observations on circumnutation by FD, Kraus, Wortmann.

Comments on FD’s notions about movement of multicellular and unicellular organisms.

Comments on an interesting letter received from J. B. Hannay [see 13222] which leads CD to speculate on the possibility of organisms inhabiting a red hot earth under great pressure.

Comments on the response to Movement in plants, which seems to have been successful.

Is going over revises of Earthworms.

Is investigating further his notion that leaves align themselves in the rain so as to shoot off drops of water.

Reports de Bary’s opinion of Max Cornu. Accounts of various botanical experiments and observations.

Reports on a visit to Hermann Vöchting and discussion of Julius Sachs.

Has been reading Julius von Wiesner’s book [Das Bewegungsvermögen der Pflanzen (1881)]. Comments that it is "an excellent book, but he vivisects me in the most grievous terms, but most effectively".

Has been experimenting on aggregation of chlorophyll but with little success.

Thinks FD should review Julius von Wiesner’s book [Das Bewegungsvermögen der Pflanzen (1881)]. CD comforted that Wiesner’s experiments support their findings but finds it laughable how differently he has interpreted them.

Earthworms is selling well.

Discussed how to repeat some of their plant experiments while in Cambridge.

Comments on Julius Wiesner’s views on plant movement.

S. H. Vines was very much surprised at the action of carbonate of ammonia on the roots of Euphorbia.

Commiserates on news of Wiesner and experiment on transmission of heliotropism. Asks whether he should review book for Nature.

Comments on two letters received from W. F. P. Pfeffer [13425, 13464] who thinks Julius Wiesner’s view that light, etc. acts directly on plants is wrong.

Is frantic over the number of letters received about worms; feels the enthusiasm of the reception of Earthworms is laughable.

Is confounded by Euphorbia rootlets and has re-examined the effect of carbonate of ammonia.

Has thought of three good experiments to oppose Wiesner.

Forwards a letter from W. F. P. Pfeffer, who opposes some of Julius Wiesner’s notions on plant movements.

Thanks for two letters from Pfeffer. Will return translation of Pfeffer and send a letter from Elfring. Looking forward to working on "antiWiesner" experiments. Will return on 26th or 27th.

CD asks him to say that the beautiful specimens of Dischidia arrived safely.

Andrew Clark finds that CD’s heart is perfectly right.

FD and CD have been interested in AdeC’s diagram for illustrating inheritance. The difficulty of estimating different qualities in oneself and others is very great. Encloses a diagram illustrating how FD compares himself with his parents. CD has filled in a comparison with his father. It shows he resembles his father more than FD resembles CD. [The qualities compared are: stature, hair, eyes, pulse, musical capacity, ability to draw, tendency toward biological sciences, tendency toward mathematical sciences, perseverence, memory, aptitude for foreign languages.]

About the distribution of [surplus income] funds among the children.

A circular letter on the distribution of his money at death and the division ofErasmus’ estate.

Has promised to pay Hooker about £250 annually "for the formation of a perfect MS catalogue of all known plants [Index Kewensis]".