Heredity in relation to evolution and animal breeding,

"Based on a course of eight lectures delivered in November and December, 1910, before the Lowell institute, Boston, as well as on a course of five lectures delivered before the Graduate school of agriculture held under the auspices of the Association of agricultural colleges and experiment stations at Ames, Iowa, in July, 1910."--Pref.

Last words on evolution; a popular retrospect and summary,

A course of three lectures delivered at the Academy of music, Berlin, April 1905.