Lachmann, Rolf, ed.  "Susanne K. Langer's Notes on Whitehead's Course on Philosophy of Nature."  Process Studies 26, nos. 1-2 (Spring-Summer 1997): 126-50.

Abstract

The paper is a transcription of a part of Langer's notes from Whitehead's course on the philosophy of nature, beginning on October 8 and running through December 20, 1927. The document shows Whitehead's efforts toward the elaboration of his metaphysical system, as finally published in Process and Reality.  [Abstract from The Philosopher's Index]