DEFINITIONS OF TERMS USED. 245 



Carbonic acid. A poisonous gas arising from the combustion 

 of coal or wood. It is formed in all kinds of fermentations and 

 therefore occurs In deep silos in the siloing of fodders. 



Casein. The protein substance of milk which Is coagulated 

 by rennet or acids. 



Cellulose. See fiber. 



Concentrates. The more nutritious portion of the rations of 

 farm animals embracing such feeding stuffs as wheat bran, corn, , 

 oil meal, etc.; synonymous with grain feedfe, or concentrated feeds. 



Corn fodder or fodder corn. Stalks of corn which are grown 

 for forage and from which the ears or nubbins have not been re- 

 moved. 



Corn stover or stalks. The dry stalks of corn from which the 

 ears have been removed. 



Crude fiber. See Fiber. 



Digestible matter. The portion of feeding stuffs which Is di- 

 gested by animals, i. e., brought in solution or seml-solution by 

 the digestive fluids, so that it may serve as nourishment for the 

 animal and furnish material for the production of meat, milk, 

 wool, eggs, etc. 



Dry matter. The portion of a feeding stuff remaining after the 

 water contained therein has been removed. 



Ensilage. An obsolete word for silage. Used as a verb, like- 

 wise obsolete, for to silo; to ensile also sometimes incorrectly 

 used for the practice of placing green fodders into a silo. 



Enzyme. An unorganized or chemical compound of vegetable 

 or animal origin, that causes fermentation, as, pepsin or rennet. 



Ether extract. The portion of a feeding stuff dissolved by 

 ether; mainly fat or oil in case of concentrated feeding stuffs; in 

 coarse fodders, f^t, mixed with a number of substances of uncer- 

 tain feeding value, like wax, chlorophyll (the green coloring matter 

 of plants), etc. 



Fat. See ether extract. 



Feed unit. A quantity of different feeding stuffs that has been 

 found to produce similar results In feeding farm animals as one 



