1890.] 



PUBLIC DOCUMENT — No. 4. 



227 



ratio, on the other hand, is one in which the carbohydrates 

 largely exceed the proteine ; e. g., 1:8, or 1 : 12. The term 

 narrow, as applied to nutritive ratios, amounts to the same 

 as saying that the food is rich in nitrogen ; the term wide is 

 equivalent to saying that the food is comparatively poor in 

 nitrogen. 



For the convenience of those wishing to feed in the most 

 economical manner, the Germans have prepared tables show- 

 ing the proper amounts of the different nutrients for animals 

 of different kinds and ages. These tables include what are 

 called feeding standards. 



The standards adopted for growing fat pigs are as fol- 

 lows : — 



Feeding Standards, — per Day and per Head.* 



* Armsby's " Manual of Cattle-Feeding." 



To use such a table intelligently, it is necessary to know 

 the amounts of digestible proteine (or albuminoids, — these 

 two words are both used for the same thing) , carbohydrates 

 and fat in the foods we propose to use. Such information 

 has been published in the reports, but particularly in the sixth 

 annual report, of the State Experiment Station. * Having 

 such tables of composition, we can easily find by a little cal- 

 culation how much of certain foods will suffice to furnish the 

 required nutrients for a given number of animals. Let me 

 illustrate. Suppose you wish to find out what amounts of 



