E-text prepared by Irma Spehar, Turgut Dincer, and the Online Distributed Proofreading Team (http://www.pgdp.net) from page images generously made available by Internet Archive/American Libraries (http://www.archive.org/details/americana) Note: Images of the original pages are available through Internet Archive/American Libraries. See http://www.archive.org/details/sciencemedievalt00allbrich SCIENCE AND MEDIEVAL THOUGHT. * * * * * London: C. J. CLAY AND SONS, CAMBRIDGE UNIVERSITY PRESS WAREHOUSE, AVE MARIA LANE. Glasgow: 50, WELLINGTON STREET. Leipzig: F. A. BROCKHAUS. New York: THE MACMILLAN COMPANY. Bombay: E. SEYMOUR HALE. * * * * * SCIENCE AND MEDIEVAL THOUGHT The Harveian Oration Delivered Before the Royal College of Physicians, October 18, 1900, by THOMAS CLIFFORD ALLBUTT, M.A., M.D. Cantab. Fellow of the College, Hon. Ll.D. Glasgow, Hon. M.D. Dubl., Hon. D.Sc. Vict., Hon. F.R.C.P. Dubl., F.R.S. Regius Professor of Physic in the University of Cambridge; Fellow of Gonville and Caius College, Cambridge; Consulting Physician to the Leeds General Infirmary; Physician to the Addenbrooke's Hospital, Cambridge. London C. J. Clay and Sons Cambridge University Press Warehouse Ave Maria Lane 1901 [All Rights reserved.] “Duo enim sunt modi cognoscendi, scilicet per argumentum et experimentum. Argumentum concludit, et facit nos concludere quæstionem, sed non certificat, neque removet dubitationem, ut quiescat animus in intuitu veritatis, nisi eam inveniat via experientiæ.” ROGER BACON, _Op. Majus_, Venet. 1750, p. 336. TO SIR WILLIAM SELBY CHURCH, BART., M.D. PRESIDENT OF THE ROYAL COLLEGE OF PHYSICIANS OF LONDON, THIS ORATION, DELIVERED AT HIS REQUEST, IS DEDICATED. ERRATUM. p. 78, note 1, l. 19; _for_ “were in orders, for the most part in holy orders;” _read_ “were generally speaking in holy orders;” PREFACE.