looo : 900:: 2.5 : albuminoids required, and 



1000 : 900:: 13.5 : carbo-dydrate equivalence requred. 



The first proportion works out as follows : 2.5X900^=2250 

 -^-1000=2.25 lbs. 



The second proportion works out as follows: 13.5X900=: 

 12150-^-1000^12.15 lbs. 



That is, a 900 pound cow requires daily, albuminoids, 2.25 

 pounds; carbohydrate equivalence, 12.15 pounds. 



How shall we get this amount most economically ? almost 

 every farmer has one or more of the following course fodders, 

 straw, corn fodder, bog meadow hay, also English hay, either 

 herdsgrass, red top, or mixed hay, and corn meal ; many have 

 ensilage, and on the coast salt hay. 



The quantity of English hay, that should be fed daily, 

 when hay is the standard fodder, is from i to 1}^ per cent of 

 the live weight of the animal, and with it from )4 to ^ as much 

 of some course fodder, like straw, or cornfodder, or bog meadow 

 hay, this gives bulk to the ration and is the framework to which 

 the grain ration must be fitted. 



Let us see what this framework will furnish, to do this turn 

 to table C, and opposite "mixed hay" and "oat straw" we find 

 that 100 pounds of the former will furnish 3.71 lbs. of digest- 

 able albuminoids and 47.61 lbs. carbo-hydrate equivalence, the 

 oat straw, 1.41 lbs. and 43.31 of the same nutrients, con- 

 sequently. 



12^ pounds mixed hay will furnish 

 5 pounds oat straw will furnish 



To this add the followin grain ration : 



3 pounds cotton seed meal will furnish 

 2 pounds shorts will furnish 

 2 pounds middlings will furnish 



4 pounds corn meal will furnish 



2.18 r3.oi 



Required as shown by Table B, 2.25 12.15 



This gives a ration near enough for all practical purposes, 

 in finding what quantities of the various constituents are need- 

 ed, it will usually be necessary to make several trials before the 

 right proportion of albuminoids and carbo-hydrate equivalence 



19 



