40 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



per cent. However, if you take corn having an efficiency 

 of twenty-three per cent, and linseed meal seventeen per 

 cent, and mix them together, you will supplement the de- 

 ficiencies of your feeds to some extent, and that the com- 

 bination will have an efficiency of thirty odd per cent. 

 In other words corn and linseed meal do not have quite the 

 same deficiencies and they tend to suppliment each other. 

 On the other hand if you take corn with an efficiency of 

 twenty-three per cent, and milk with an efficiency of sixty- 

 six per cent and mix them together to make a balanced 

 ration, you will have increased the efficiency of the whole 

 combination to about the same figure that milk has, ap- 

 proximately sixty-odd per cent. In other words milk is not 

 only rich in these building stones or amino that are apt to 

 be lacking in the cereals, but it is so large it can make good 

 the deficiencies in the cereals. 



Here is a tremendous and important fact with refer- 

 ence to the use of milk for humans: milk is not only rich 

 in proteins but it has the kind of balance, the protein to 

 balance the deficiency in the protein in other articles of 

 diet. 



Just what is the application of this quality of protein 

 to practical stock feeding? The matter may be of tre- 

 mendous importance in feeding swine or poultry, because 

 swine and poultry do not consume much roughage. 



In experiments that we have carried on with swine 

 the results have been very drastic, you might say. These 

 results show that linseed meal or wheat middlings or gluten 

 feed or corn germ meal are not efficient supplements to 

 corn when fed alone; only inefficient results are secured. 

 In trials which we have carried on using linseed meal as 

 the only supplement to corn, even to pigs on pasture it has 

 been worth only about sixteen or seventeen dollars com- 

 pared with tankage or meat scraps. On the other hand 

 when we have used linseed meal with tankage, to make a 

 linseed meal feed, it has been worth more than tankage 

 instead of less. 



That is an illustration of how in swine feeding it is 

 an asset of importance to have a well-balanced protein for 



