142 



THE STORY OF MILK 



cheapest articles of diet, and should be much more 

 extensively used. 



The following table, compiled by specialists of the 

 U. S. Department of Agriculture, shows the quantities 

 of various foods needed to supply as much protein or 

 energy as 1 quart of milk : 



Another method of comparison is shown by the table 

 below, in which the relative value of certain foods as 

 economical sources of protein is given : 



According to this table, if milk is selling at 10 cents 

 a quart, sirloin steak must sell as low as 23.3 cents a 

 pound, and eggs at 25.1 cents a dozen to supply pro- 

 tein at equal cost. 



