M. Emile Boutroux will deliver the fourth of his lectures in connection with Philosophy 4 on "Contingence of Liberte," in Emerson J this afternoon at 4.30 o'clock. The lecture will be open to the public.

Mr. Boutroux is at present engaged in developing the liberal theory of contingency. His view is that contingency is the sequence of unforeseeable novelties and unexpected occurrences which interrupts the natural movement of life and which cannot be comprehended by means of our intellectual formulas.