HOW MUCH SHOULD WE EAT 



75 



Canadian lumberman. The average adult worker ought to 

 have every day sufficient food to furnish 3000 Calories of energy ; 

 a growing boy of 15 to 16 years ought to have at least 2700 

 Calories, and a girl of the same age 2400 Calories. 



The food eaten on Jan. 17, 1915, was sufficient in quantity for 

 the average girl, but hardly enough for a boy. It did not con- 

 tain the proper proportion of protein for either a girl or a boy. 

 By experiment on athletes, soldiers, teachers, and others it 

 has been found that one seventh of the Calories should be got 

 from proteins, and six sevenths from fats and carbohydrates. 



