RATIONAL FEEDING OF MEN 375 



Carbohy- Fuel Nutri- 

 Protein. Fat. drates. value. tive 



Ib. Ib. Ibs. calories, ratio. 



Man with little physical exercise. 0.20 0.20 0.66 2450 5.5 



Man with light muscular work . 0.22 0.22 0.77 2800 5.7 



Man with moderate muscular work 0.28 0.28 0.99 3520 5.8 



Man with active muscular work .. 0.33 0.33 i.io 4060 5.6 



Man with hard muscular work .. 0.39 0.55 1.43 5700 6.9 



502. Amount of Foods Consumed per Day. In com- 

 bining foods to form human rations, there should be, as 

 in animal rations, a variety of foods and no food article 

 should be used in excessive amounts. The approximate 

 amounts of food consumed per day by a man at average 

 labor, are as follows : 



Range. Average. 



Ounces. Pound. 



Bread 6 to 14 0.50 



Butter 2 to 5 0.12 



Potatoes 8 to 16 0.75 



Cheese i to 4 o. 1 2 



Beans I to 4 0.12 



Milk 8 to 32 



Sugar 2 to 5 0.20 



Meat 4 to 12 0.25 



Oatmeal i to 4 o. 12 



In a balanced ration, it is the aim to obtain from all of 

 the foods approximately 0.25 pound each of fat and pro- 

 tein and a pound of carbohydrates. In case of severe 

 work, larger amounts of nutrients, as indicated in the 

 table, are necessary. The composition of human foods 

 is given in the tables at the close of the chapter. 



In calculating the amounts of nutrients in fractions of 

 a pound, the percentage composition of the food is mul- 

 tiplied by the weight used, as in calculating animal ra- 

 tions (see Section 480). 



