FIFTY-THIRD ANNUAL CONVENTION 37 



fully prepared "feeding standards". By the use of these 

 tables, together with other tables showing the food materi- 

 als (digestible nutrients) furnished by the different feeds, 

 one can, after a little practice, work out efficient balanced 

 rations for his animals. Every stock farmer who looks upon 

 farming as a profession rather than merely as an occupa- 

 tion will take pride in mastering the methods of working 

 out balanced rations. These are no more difficult than 

 the problems in arithmetic he solved in the district school 

 when a boy. 



Adjust the Carburetor Correctly 



No one expects to get good mileage from the gasoline 

 he buys unless he has the carburetor on his automobile ad- 

 justed correctly. Yet many men pay large sums for feed 

 without knowing whether their purchases will correctly ad- 

 just the carburetors of their live stock. In other words, they 

 do not know whether the feeds they supply will provide 

 their stock with a correct mixture of the various food nu- 

 trients, just as the correctly adjusted carburetor provides 

 the gasoline engine with the right mixture of gas and air. 



Proteins Must be of the Right Kind 



Robert Burns wrote **A mon's a mon for a' that and a* 

 that'*. Nevertheless we do not believe that one man is like 

 another, or that he has the same capabilities. It is just the 

 same with the proteins in our stock feeds. 



Proteins are exceedingly complicated compounds, made 

 up of many different building stones, which the chemist 

 calls *'amino acids". Scientists have recently discovered 

 that some proteins contain all the different kinds of amino 

 acids, while others are incomplete, and do not contain cer- 

 tain of these "building stones". 



They have furthermore found that animals need for 

 growth and even life itself all of these different amino acids. 

 Furthermore, they can not manufacture in their bodies any 

 missing amino acids from other amino acids in their food, 

 with the possible exception of the very simplest ones. There- 



