

THE ENERGY REQUIREMENTS OF AN ADULT 



141 



The metabolism of a grown man, who neither rests absolutely, nor does 

 any real physical work (providing he receive not too limited a supply of 

 food), may be estimated, therefore, at 30-36 Gal. per kilogram per twenty- 

 four hours i. e., for a body weight of 70 kg., 2,100 to 2,520 Gal. Conse- 

 quently a ration which does not supply at least 2,000 Gal. net (i. e., allowing 

 ten per cent waste; cf. page 140) must be declared insufficient for a physical 

 laborer. 



Laborers' rations may be divided, according to the amount of energy 

 required, into several different groups. The following is arranged especially 

 for men : 



The following may be given as examples of rations which would yield an 

 average supply of energy sufficient for each of these classes: 



Within the last few years a large number of observations on the nutrition 

 of men who had free choice of their own food, have been made under At- 

 water's direction in the United States. The results are recorded in the 

 following table: 



Voit based his practical conclusions for the nutrition of an adult man on 

 the requirements of a moderate worker. He describes as a " moderate worker," 



