Note: Project Gutenberg also has an HTML version of this file which includes the original illustrations. See 63540-h.htm or 63540-h.zip: (http://www.gutenberg.org/files/63540/63540-h/63540-h.htm) or (http://www.gutenberg.org/files/63540/63540-h.zip) Images of the original pages are available through Internet Archive. See https://archive.org/details/evolutionadaptat00morg Transcriber’s note: Text that was in italics is enclosed by underscores (_italics_). Text that was in bold face is enclosed by by equal signs (=bold=). A caret character is used to denote superscription. A single character following the caret is superscripted (example: J^1). EVOLUTION AND ADAPTATION ------------------------------------------------------------------------ [Illustration: Publisher's logo (The Macmillan Company)] ------------------------------------------------------------------------ EVOLUTION AND ADAPTATION by THOMAS HUNT MORGAN, Ph.D. New York The Macmillan Company London: Macmillan & Co., Ltd. 1908 All rights reserved Copyright, 1903, by The Macmillan Company. Set up and electrotyped. Published October, 1903. Reprinted January, 1908. Norwood Press J. S. Cushing Co.—Berwick & Smith Co. Norwood, Mass., U.S.A. ------------------------------------------------------------------------ TO Professor William Keith Brooks AS A TOKEN OF SINCERE ADMIRATION AND RESPECT ------------------------------------------------------------------------ PREFACE