viii PREFACE 



and Surgical Journal. Appendix D is reprinted 

 from Science. Appendix E was read before 

 Section D of the British Association for the 

 Advancement of Science at the Bristol Meeting. 

 Subsequently it was published in Natural Science, 

 December 1898. Appendices C and E have 

 obvious bearings on the doctrines of this book. 

 The latter merely re -affirms in more technical 

 terms and in greater detail the doctrine laid down 

 in Chapter V. Appendix D has a less obvious 

 bearing, but is included to prove that Social and 

 Moral Evolution— concerning which so much has 

 been written of late — are myths, from the biological 

 point of view, and that the only real evolution 

 Man is undergoing is that indicated in the body 

 of the work. 



The writer ventures to call the reader's attention 

 to Appendix M. It is the Report of a Research 

 Committee, appointed by The Society for the Study 

 and Cure of Inebriety, " to consider the conditions 

 under which a tendency to inebriety is trans- 

 mitted from parent to offspring." The member- 

 ship of this Society is limited to medical men, but 



