48 MAN"U"AL OF CATTLE-FEEDING. 



given, is needed in larger amoimts tlian tliose contained in 

 most fodders. 



Such being tlie case it is not necessary, for the purposes 

 of tlie present work, to do more than mention these sub- 

 stances. 



§ 5. FOBBEB AjSTALYSIS. 



In the preceding sections we have indicated briefly the 

 occurrence and properties of the most important nutrients. 



It only remains to describe, in a general way, the nsual 

 methods of determining the amount of these present in 

 any fodder. 



In the present state of our knowledge it is impossible, 

 even were it necessary, to separate and determine all the 

 multitudinous substances which may occur in a fodder, and 

 we must content ourselves with distinguishing the several 

 groups of nutrients. 



Albuminoids.4-The amount of albuminoids in a fodder 

 has generally been found by multiplying its content of 

 nitrogen by 6.25,{it being assumed, first, that all the albu- 

 minoids contain 16 per cent, of nitrogen, and, second, that 

 no other nitrogenous substances are present^ 

 / Neither of these assumptions being, as we have seen, 

 tetrictly true, it follows that the result can only be approxi- 

 mate, and in view of this fact it is designated as crude 

 protem, I 



Of me two souixes of error arising under the above as- 

 samptions, the second is the more serious. It is only within 

 a very short time that feeding-stuffs have b^iin to be ex- 

 aminid for amides, but the results already obtained show 

 that these bodies are to be found far more extensively, aftd 

 in greater quantity, in feeding-stuffs than was before bus- 

 pwted. This is especially tlie case with those foddere 



