This is the manuscript of a lecture presented in Houson Hall at the University of Pennsylvania; it was published in "Old Penn," November 21, 1914.

Primary source materials for the history of quantum physics in the twentieth century, collected under the auspices of the APS and the American Physical Society, with a grant from the National Science Foundation. There are transcripts of the oral history interviews, as well as the working papers of the Committee. These include correspondence with famous figures in physics, with some memoirs, photographs, lectures, etc. On microfilm (see Mss. 530.1 Ar2 ) are manuscripts of Niels Henrick David Bohr and his scientific correspondence (62 reels from the Niels Bohr Archives, Universitets Institut for Teoretisk Fysik, Copenhagen). This collection is described and analyzed in Sources for the History of Quantum Physics: An Inventory and Report, by Thomas S. Kuhn, John L. Heilbron, Paul Forman, and Lini Allen (Philadelphia, 1967). The subject guide derived from the work has subsequently been digitized in its entirety and is available through the finding aid for Mss. 530.1 Ar2 .

Physician John Wakefield Francis (1789-1861) cofounded the New York Academy of Medicine. He served as the second president of the Academy, taught at Bellevue Hospital, wrote medical texts, and edited professional journals. Collection consists of correspondence, financial papers, writings, by-laws and minutes, and related papers of Francis and others. Correspondence of others include letters to Francis's associates and family members. Financial documents, 1798-1851, are accounts, receipts, receipt books, checks, and collection notices. Writings are speeches, lectures and notes of Francis and others. Also, minutes and by-laws, 1807-1810, of the Medical and Surgical Society of the University of New York State; and printed material.

Heavily edited, much of this material was used in his lectures on physiology. The section "Of pleasure: Lect: 20th" (ff. 473-477), corresponds word-for-word with some parts of "Two Lectures upon the Pleasures of the Senses and of the Mind," at the end of his "Sixteen Introductory Lectures" (Philadelphia, 1811).

These papers include correspondence, notes, lectures, articles, and clippings pertaining to scientific matters.