CD’s observations on the power of movement and transmission of motor impulses in plants. If RLT succeeds with the tails of mice, it will be "a beautiful little discovery"; CD will enjoy it the more "because some German sneered at natural selection and instanced the tail of the mouse" [see 10013].

Has found that H. G. Bronn in the chapter appended to his translation of Origin cited ears and tail of mice as facts opposed to natural selection. Suggests RLT examine hairs of tails of mice for possible nerves.

RLT’s observations come too late, as CD’s book on Droseraceae has been printed.

Reports on his observations of ferment in secretions in Drosera rotundifolia and Drosophyllum.

RLT will find abundant evidence of absorption by Aldrovanda in CD’s forthcoming book [Insectivorous plants]. Congratulates him on his discovery of ferments.