58 PHYSIOLOGY AND NATIONAL NEEDS 



basis. Thus in order to ascertain the relative value 

 of different antiscorbutics it is necessary to estab- 

 lish in each case the minimum amount of the 

 material which wards off scurvy, and each experi- 

 ment of this sort must be carried out on several 

 animals in order to eliminate the effect of in- 

 dividual idiosyncrasies. 



The general results of the experiments so far 

 made is shown in the following tables, in the first 

 of which the distribution of the principle in a 

 number of food materials is indicated, and is con- 

 trasted with that of the antineuritic and fat-soluble 

 accessories, the relative abundance being indicated 

 by the number of + signs. In the second a roughly 

 quantitative estimate is made of the relative 

 amounts present, taking that in fresh cabbage 

 leaves — one of the richest sources which we have 

 —as 100.1 



TABLE I 



SHOWING THE DISTRIBUTION OF THE THREE ACCESSORY FACTORS 



IN SOME COMMON FOOD-STUFFS 



^ For permission to include some of these numbers, which have not 

 yet been published, I have to thank Miss Chick and her colleagues. 



