PREFACE vii 



the diminution or extinction of the supply of 

 alcohol — Total Prohibition, Local Option, the 

 Gothenburg System, etc. — is, in effect, a scheme 

 for the promotion of drunkenness," will not be 

 destroyed. 



The remedy suggested by the author may be 

 impracticable at present. But it is the only real 

 remedy, and Nature has found it practicable. 



The writer thanks the Editors of The Lancet, 

 The Scottish Medical and Surgical Journal, 

 Natural Science, The Medical Magazine, and other 

 periodicals, for permission to reproduce articles or 

 parts of articles which have appeared in their 

 journals. Portions of the present volume were 

 utilized for a course of lectures on Heredity in 

 the University of Edinburgh. Chapters III. and 

 IV. originally appeared in The Scottish Medical 

 and Surgical Journal, whence they have been 

 adapted for the purposes of this work. The 

 extracts from the evidence given before the Royal 

 Commission on Opium were published in "The 

 Present Evolution of Man." Appendix C is 

 adapted from The Lancet and The Scottish Medical 



