Mr. Henry M. Scheffer, of the Graduate School of Arts and Sciences, will deliver, during the first half year, a series of lectures on "Modern Logic."

The first part of the course will deal with the Calculus of Classes, Propositions and Relations, and will indicate the relations of this modern logic to the traditional logic. The second part of the course will examine the logical foundations of some fundamental mathematical concepts, and will consider such topics as Definitions of Pure Mathematics, Definition of Postulates and Abstract Definitions of Geometry.

These lectures, which are intended for students of Mathematics as well as for students of Philosophy, will be open to graduate students in the University and in Radcliffe College. Only a very elementary knowledge of Mathematics and of Logic will be required.

The first meeting, for the purpose of organization, will be held next Monday, at 4.30 o'clock, in Emerson H.