I. THREE LECTURES ON EVOLUTION. (New York, September 18, 20, 22, 1876).

            LECTURE I. The Three Hypotheses respecting The History of Nature

            LECTURE II. The Hypothesis of Evolution. The Neutral and the Favourable Evidence

            LECTURE III. The Demonstrative Evidence of Evolution

            II. AN ADDRESS ON THE OCCASION OF THE OPENING OF THE JOHN HOPKINS UNIVERSITY (Baltimore, September 12, 1876)

            III. A LECTURE ON THE STUDY OF BIOLOGY, IN CONNECTION WITH THE LOAN COLLECTION OF SCIENTIFIC APPARATUS. (South Kensington Museum, December 16, 1876)