A philosopher and teacher, Paul WEISS was born in New York City. A.B.S.S. of City Collage, he took his M. I. and Ph.D. at Harvard, where he worked under the friendly stimulus of Alfred North Whitehead. The tribute which follows was written directly after Professor Whitehead’s death last December, and at the urging of the Harvard Crimson, with whose kind permission the essay is reprinted. The author of three volumes, The Nature of Systems, Reality, and Nature and Man, the founder and editor of the Review of Metaphysics, Mr. Weiss is professor of philosophy at Yale University.