O'SHEA — ASPECTS OP MENTAL ECONOMY. 91 



To supply the energy required for all the needs of the organ- 

 ism during a day's activities, authorities agree substantially 

 upon the quantity of the various food materials necessary, al- 

 though the standards calculated for Germany and America are 

 somewhat different, the American being considerably higher, 

 probably due to the fact that our people are more active than the 

 Germans, and are constantly expending more energy, possibly a 

 good part of it going to waste. Atwwter 1 gives the American 

 and European dietary standard as follows : 



^Op. cit., p. 18. 



