FOOD AND WATER, STIMULANTS, ETC. 79 



9, Some animals live only on other animals. Their 

 teeth are not fit for chewing vegetable food. Other 

 animals live wholly on plants. Their teeth are made for 

 grinding, hut not for tearing flesh. The cow, for example, 

 has no cutting-teeth in her upper jaw. She has broad 

 grinders. Man eats both animal and vegetable food. 

 His teeth are adapted to both. 



10, The infant, and the young of many of the lower 

 animals, live on milk. No other article of food so well 

 combines all the necessary elements as this. It is easily 

 digested, and, after infancy is passed, is still an excellent 

 article of diet. In sickness it is often used with advantage 

 as the sole nutriment. 



11, Man's ordinary diet consists of meats (including fish 

 and eggs), starchy foods, sugar, and fat. 



MEATS. 



12, Of meats, there are many kinds. The appetite is 

 gratified, and the body better nourished, by a variety. 

 Beef is the best. Pork is the staple meat-food of large 

 numbers of people. It is not so wholesome as beef, for 

 two reasons : 



1. It commonly contains a great deal of fat, too much 

 for constant use. 



2. It is more likely than beef or mutton to contain the 

 young of the tapeworm, and oi\\e? parasites. 



Veal is tender and good, but not so easily digested as 

 beef, nor is it so nourishing. Lamb is very easily digested. 

 Mutton is more nourishing than either lamb or veal, and 

 is nearly as good food as beef. To some stomachs, how- 

 ever, it is not acceptable. Each of the various kinds of 

 game has its peculiar flavor, but they do not differ much 

 in nutritive value. 



