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.

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.

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

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