Surprising thought that diseases of plants should illustrate human pathology.

Will recommend A. B. Frank’s article in a German encyclopedia, on diseases of plants, to Francis Darwin.

Gives JP a good case of regeneration in plants – the radicle of the common bean. That plants have little power of regeneration is not difficult to understand by anyone who believes in Pangenesis, "if such a man exists … There is reason to think that my imaginary gemmules have small power of passing from cell to cell."

Refers to early experiments in which he tried to produce galls in plants by injecting poisons.

Asks PLS to sign the memorial for a pension for Wallace.

Thanks JL for copy of Die Religionen [1881].

Thanks YD [for Contribution à l’étude de l’appareil circulatoire des crustacés édriopthalmes marins (1881)].

Acknowledges receipt of parcel of colours and chemical reagents.

Asks correspondent to sign certificate for Raphael Meldola [as a candidate for Royal Society].