MAN 299 



The protein is used primarily for building body substance, 

 and nitrogen is its most important chemical element. 

 Carbohydrates and fats furnish energy to carry on the work 

 necessary for the activity of the body, and their important 

 element is carbon. If the daily ration is poor in protein, 

 carbohydrates and fats cannot make up the deficiency; 

 if it is lacking in carbonaceous substances, the proteins 

 must be broken down in excess to release energy. In 

 addition to organic foods, water and particular mineral 

 salts are of course necessary. 



Lean Beef 

 L ean smoked ham 

 Bacon smoked 

 Fresh codfish 



Milk 



Buffer 



Oatmeal 



Rice 



IVhite bread 



Dried beans 



String beans 



Cabbage 



Green corn 



Potatoes 



L e/Tuce 



Tomatoes 



Apples 



Almonds 



Chestnuts 



Peanuts 



\SMHProtein I Varhohydrate 



FIG. 108. Constituents of common foods. (From data in Sherman's Chemistry 

 of Food and Nutrition.) 



Man is well-equipped to seek and capture food. A 

 savage depends mostly upon his sight and hearing to dis- 

 cover suitable plants or animals, though the senses of 

 touch, taste, and smell are often employed. The organs 

 of smell are somewhat degenerate and far less effective 

 than in many other mammals, such as the dog or deer. 

 The pos'tion of the eyes compensates for this deficiency, 

 however, by giving man the advantage of binocular vision 

 which permits accurate judgment of distances to objects. 

 The legs are well-suited for pursuing prey, and in some 

 primitive races (Igorrotes) are used also for holding objects. 



