PREFACE 



IN 1890 I gave a lecture to the Edinburgh 

 Health Society, which appeared as No. 2 

 of their Eleventh Series. Its title is " The 

 Importance of Ideals of Health, Beauty, etc., 

 in Race Progress." 



Much the same thesis considerably ex- 

 panded was given by me in the form of 

 three Milroy Lectures to the Royal College 

 of Physicians of London in March, 1894, 

 and appeared at the time almost verbatim 

 in the Lancet. 



The present volume contains these lectures 



