Has not heard from Appleton about an American edition [of Forms of flowers]. Asks how many copies Murray is printing.

No summary available.

CD interested in EK’s argument against belief that sense of colour has been recently acquired by man. Describes his observations of the difficulty his own children had in distinguishing, or naming, colours.

Adds that it appeared to him the gustatory sense of his children, when young, differed from that of grown-up persons.

He is delivering address at the British Medical Association’s Manchester meeting ["Address in medicine", Br. Med. J. (1877) pt 2: 168–73]. Will develop theme that parasites are variations of common types, e.g., Bacillus anthracis is a variant of B. subtilis. Asks for more examples.

Wants CD’s advice on who would undertake describing the Crustacea from the Challenger expedition [1872–6].