MAY 1 4 1928 ARE THE EFFECTS OF USE AND DISUSE INHERITED? AN EXAMINATION OF THE VIEW HELD BY BY WILLIAM PLATT BALL = London MACMILLAN AND CO. AND NEW YORK 1890 The Right of Translation and Reproduction is Reserved PREFACE. My warmest thanks are due to Mr. Francis Darwin, to Mr. E. B. Poulton (whose interest in the subject here discussed is shown by his share in the translation of Weismann's Essays on Heredity), and to Professor Romanes, for the help afforded by their kindly suggestions and criticisms, and for the advice and recommendation under which this essay is now published. Encouragement from Mr. Francis Darwin is to me the more precious, and the more worthy of grateful recognition, from the fact that my general conclusion that acquired characters are not inherited is |