E-text prepared by Marilynda Fraser-Cunliffe, L. N. Yaddanapudi, and the Online Distributed Proofreading Team (http://www.pgdp.net) Note: Project Gutenberg also has an HTML version of this file which includes the original illustrations. See 37759-h.htm or 37759-h.zip: (http://www.gutenberg.org/files/37759/37759-h/37759-h.htm) or (http://www.gutenberg.org/files/37759/37759-h.zip) DARWIN, AND AFTER DARWIN II Post-Darwinian Questions Heredity and Utility * * * * * BY THE SAME AUTHOR. DARWIN AND AFTER DARWIN. An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions. 1. THE DARWINIAN THEORY. 460 pages. 125 illustrations. Cloth, $2.00. 2. POST-DARWINIAN QUESTIONS. Edited by Prof. C. Lloyd Morgan. 338 pages. Cloth, $1.50. Both volumes together, $3.00 net. AN EXAMINATION OF WEISMANNISM. 236 pages. Cloth, $1.00. THOUGHTS ON RELIGION. Edited by Charles Gore, M.A., Canon of Westminster. Second Edition. 184 pages. Cloth, gilt top, $1.25. THE OPEN COURT PUBLISHING COMPANY, 324 DEARBORN STREET, CHICAGO. * * * * * [Illustration: Frontispiece] DARWIN, AND AFTER DARWIN AN EXPOSITION OF THE DARWINIAN THEORY AND A DISCUSSION OF POST-DARWINIAN QUESTIONS by the Late GEORGE JOHN ROMANES, M.A., LL.D., F.R.S. Honorary Fellow of Gonville and Caius College, Cambridge II Post-Darwinian Questions Heredity and Utility FOURTH EDITION Chicago London The Open Court Publishing Company 1916 Chapter 1 Copyrighted by The Open Court Publishing Co. Chicago, Ill., 1895 Printed in the United States of America PREFACE As its sub-title announces, the present volume is mainly devoted to a consideration of those Post-Darwinian Theories which involve fundamental questions of Heredity and Utility. As regards Heredity, I have restricted the discussion almost exclusively to Professor Weismann's views, partly because he is at present by far the most important writer upon this subject, and partly because his views with regard to it raise with most distinctness the issue which lies at the base of all Post-Darwinian speculation touching this subject--the issue as to the inheritance or non-inheritance of acquired characters.