1895.] 



PUBLIC DOCUMENT — No. 33. 



19 



excreted in the same time on the basis of dry matter. The 

 difference between them will represent the amount of the 

 various constituents of the food digested. 



The percentages of the constituents digested are called the 

 digestion coefficients. 



A Single Illustration, sJioioing hoio the Digestibility of a 



Fodder is determined. 



[Solid manure equals the undigested part of food.] 

 English Hay. 



Having noted the various groups of substances going to 

 make up our cattle foods, and recognizing that these groups 

 are valuable as sources of nourishment only in so far as 

 they are digestible, let us next inquire into the proper way 

 of combining these foods, so as to produce properly balanced 

 daily diets or 



Fodder Kations for the Animals of the Farm. 



A great many experiments have been made in order to 

 study the behavior of the protein, carbohydrates and fat in 

 the animal body, and their specific influences upon the for- 

 mation of flesh, fat and milk. We will not attempt in this 

 connection to give in detail the results of the.se studies, liut 

 simply state that they have led to the combining of our 

 coarse and concentrated foods in such a way as to ol)taiii 

 in the daily diet of the animal the digestible protein, fat and 

 carbohydrates in certain reasonably definite proportions. 



The German investiirator AVolff, who has made a close 

 study of all experiments along this line, has concluded that 

 a milch cow, for example, in order to produce a large and 

 well-sustained yield of milk, should be fed about 2.5 pounds 



