Sends CD the 2d part of his travels into the Tien-shan mountains [Erforschung des Thian-Schan Gebirgs-Systems (1875)].

Has written a paper on the ranges and systematics of wild sheep and on modifications probably resulting from competition with domestic sheep, which he wishes to translate into English and would like to see appended to Variation.

Discusses sexual selection in thrushes; it apparently modifies one species into another.

Reports on Schrankia aculeata in which pinna and pinnule are sensitive, but, unlike Mimosa pudica, rachis does not move.

Comments on Insectivorous plants.

Describes his own work on fossil flora of Eastern Siberia.

Discusses genus Ginkgo.

Working on plant physiology; has not strength to discuss difficult subject with anyone.

Asks FD to make out [Hermann] Hoffmann’s conclusions about the fertilisation of Phaseolus multiflorus [in Untersuchungen zur Bestimmung des Werthes von Species und Varietät (1869)].