202 Singing Valleys 



Of these, the three and one-half pounds of protein, and 

 the three-fourths of a pound of mineral matter are the most 

 important ingredients as far as the healthful qualities of milk 

 are concerned. We can live a long time without fat or carbo- 

 hydrates. But not without protein. The last is needed to build 

 up the worn tissues of the body, to develop muscles, nerves, 

 skin, blood and lymph. The body of the average man is fifteen 

 percent protein. The adult requires one-half gram of protein 

 per pound body weight daily to keep in condition. Milk is a 

 valuable source of protein. It also affords phosphorus and 

 calcium. A pound of milk contains three times as much cal- 

 cium as a pound of wheat. It greatly exceeds the calcium 

 content of corn, though the corn is necessary to the making 

 of the milk. Too, cows' milk has four times as much calcium 

 as human milk contains. Bottle-fed babies should develop 

 good bones and teeth. 



Do you know what gives beefsteak its distinctive, delicious 

 flavor? Protein. It's the protein you taste in beef tea and in 

 soups made of beef. All protein does not taste the same. But 

 the protein of the kernel of com and the protein in the 

 porterhouse steak taste so much alike that no epicure can tell 

 the difference. Perhaps that is what makes corn the ideal food 

 for cattle. At any rate, the corn protein is valuable to the soup 

 and seasoning manufacturer as a beef substitute which has 

 both the flavor and the food value of the meat. 



Casein, which is one of the protein ingredients in milk, is 

 unlike anything found in any other food. It is this which 

 forms the skin on milk when heated. It is also the basis of 

 cheese. Casein has commercial values aside from the dairy. It 

 is used in plastics and to make substitutes for tortoise shell. 

 The comb you run through your hair was once a gallon or 

 two of milk. A month or two before that, it was an acre of 

 corn growing in a field. A hawk circled over it, watching for 

 field mice intent on stealing the grain. 



The polish on the body of your new car came out of a 

 milk pail. So did some of the glue in the cold-water paints 



