8 Preface 



provided the basis of the argument. Chapters III 

 and V may be said to be wholly his. 1 



W. HALL CALVERT, m.d. 



"The Laurels," 

 Melrose. 



1 "No Struggle for Existence; No Natural Selection." George 

 Paulin. Edinburgh, T. T. Clark, 1908. 



