FEEDS AND FEEDING 



309 



protein, carbohydrates, fat, and mineral matter (Fig. 208). 

 Such reports are very valuable to all stock feeders, as the 

 figures indicate as clearly as is possible the feeding value of 

 each kind analyzed. Those feeds, rich or poor in any one 

 ingredient, as protein, may be easily compared in the pub- 

 lished tables. (See Appendix.) 



Feeds Changed Into Animal Tissues. — The object of 

 feeding is to furnish material for supporting life, and for 

 building up the animal body and the securing of some prod- 



FiG. 208. — The bottle at the right represents 100 ounces of shelled com. The 

 five bottles at the left represent the chemical composition of this corn as determined 

 by analysis. The elements are as follows: starch, 80.35 oimces; protein, 10.92 

 ounces; oil, 4.70 oimces; fiber, 2.60 ovmces; ash, 1,43 ounces. 



uct, as milk from cows, eggs from hens, wool from sheep. 

 Each of the four classes of compounds of the feed is of special 

 use in the process. Any one alone, as starch or fat, is unable 

 to completely nourish the body and maintain Hfe. 



Animals are incapable of making very great changes in 

 these feed compounds. Each is changed into similar animal 

 products in the living animal by a series of processes called 

 digestion, circulation, respiration, secretion, and absorption. 



Loss in These Processes. — In these five processes of 

 life, digestion in particular, the substances contained in the 



