viii AUTHOR'S PREFACE 



study than are those of the newer school. Voit, who may be 

 taken as a distinguished representative of the former, stands 

 to-day absolutely vindicated ; whilst the earnest plea put for- 

 ward by Chittenden, for a lowering of the protein and caloric 

 value of dietaries by large amounts, cannot be regarded as longer 

 possible, in the light of the accumulated evidence of the ill- 

 effects that follow in the train of chronic underfeeding. 



The photographs, illustrating, so far as it is possible to do so, 

 the physique of the different races and tribes investigated, have 

 been very carefully selected as being as nearly as possible typical 

 of the average development met with. 



The author tenders his grateful thanks to all those whose 

 works have been of assistance in the argument set forth ; 

 wherever possible full acknowledgment has been made in the 

 text. He wishes particularly to thank his assistants in the 

 laboratory, without whose willing co-operation much of the 

 work herein recorded would have been impossible of performance. 



D. McCAY. 



PHYSIOLOGICAL DEPARTMENT, 

 MEDICAL COLLEGE, 

 CALCUTTA. 



July, 1912. 



