FEEDING THE STOCK 



101 



top of boiled milk is protein; the principal part of 

 cheese, the curd, is protein; lean meat is composed 

 largely of protein ; glue is protein ; the hide, hair, wool 

 and feathers of animals are largely protein. You all 

 know the odor of burned feathers; any kind of sub- 



A PRIZE COACH HORSE. 



stance that scorches and gives off that odor contains 

 protein. 



Carbohydrates. Starch, sugar and vegetable fiber 

 are called carbohydrates. In a certain sense fats, too, 

 are carbohydrates, but they are usually put in a class 



