Preface 



THE series of popular lectures published in this volume 

 was delivered under the auspices of the Missouri Chapter 

 of the Sigma Xi during the Academic Year 1 925-1 926. The 

 subject of Growth is one that has been given particular attention 

 at the University of Missouri, and is one to which each of the 

 collaborators of this volume has made original contributions. 

 Dr. Jackson, now director of the Anatomical Institute at the 

 University of Minnesota, was formerly a member of the Medi- 

 cal faculty at the University of Missouri, and began his re- 

 searches on growth at that institution. 



It is of course impossible in a series of five lectures to give an 

 exhaustive discussion of growth. The aspects of the subject here 

 presented have been selected with the aim of giving a compre- 

 hensive concept of growth. The introduction deals primarily 

 with the nature of growth. The next three lectures discuss 

 growth in its statistical, nutritional, and morphological aspects, 

 respectively. The lecture on physiological regulation of growth 

 closes the series. The illustrative material for each lecture is 

 drawn chiefly from the field in which its author is primarily 

 interested. 



Bibliographies for individual chapters have been grouped at 

 the end of the book. 



H. D. Hooker, 



Secretary, Missouri Chafter, 

 Sigma Xi, 

 Columbia, Missouri. 

 June, 1927. 



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