4 INTRODUCTION 



definite significance to such terms as " good physique," 

 " poor physique," " physical fitness," and so forth. 



THE NORMAL FIGURES. The data forming the basis 

 for the calculation of the present Tables in the case of 

 normal, healthy men and women are derived from the 

 analysis of a number of observations sufficient to ensure a 

 degree of accuracy that should prove entirely satisfactory. 

 While it cannot be claimed that the constants employed 

 for the various indices given in the Tables are to be 

 regarded as fixed and final, it can be stated that any 

 changes they may have to undergo in the future, as a 

 result of the further accumulation of data, in normal 

 adolescents, men, and women, will be small and not likely 

 to impair their present validity from the practical point 

 of view. 



I should like to record our thanks to the Medical 

 Research Council for the help they have afforded us 

 in enabling Us to test the Tables on a large material 

 already collected under their auspices, as well as to 

 Dr. A. J. Jex-Blake, Physician to St. George's Hospital, 

 Mr. H. F. Pierce, late Major American Medical Air 

 Service, and Dr. F. G. Hobson, D.S.O., for valuable 

 assistance rendered during the preparation of the Tables. 



G. D. 



