M-31 



P632L 



INTRODUCTION 



The following Lecture is published at the 

 earnest request of several friends who are 

 interested in the subject and who heard it 

 delivered as one of a series of " Science 

 Lectures for the People " early in the present 

 year. 



I have to thank Mr. Bateson and Mr. Punnett 

 for kindly allowing me to include their portraits 

 and also must acknowledge my indebtedness 

 to their works on Mendelism for many of the 

 statements contained in this lecture. 



H. Drinkwater 



Wrexham, 



Sept. igio. 



