Assistant Professor L. J. Henderson, of the Department of Chemistry, will give a course of five lectures on "Teleology and Natural Science" on Friday afternoons, beginning February 18. The lectures will be given in Emerson F at 4.30 o'clock, and will be open to the public. The dates and titles are as follows:

February 18.--From Aristotle to the Establishment of the Principles of Dynamics.

February 25.--From the Establishment of the Principles of Dynamics to the Break between Science and Philosophy.

March 3.--Teleology in Modern Biology.

March 10.--Evolution.

March 17.--The Order of Nature.