Sends seeds from R. L. Playfair in Algiers.

F. Delpino writes asking where M. A. Curtis has published physiological observations on Dionaea ["Enumeration of plants growing spontaneously around Wilmington, North Carolina", Boston J. Nat. Hist. 1 (1834–7): 82–140; see Insectivorous plants, p. 301 n.].

Talk with Duke of Argyll on CD’s and Wallace’s views on man.

Thanks for many works, especially double star catalogs, about which JH requests further information, and which will help JH's attempt to compile digest of all measures of all known double stars.