FOODS ANIMAL PRODUCTION. 



479 



Digestible nutrients in the two rations as calculated and as actually determined. 



Calculated from averages. 



Determined. 



Organic 

 matter. 



Ration 1: Timothy bay 5 lbs., corn 

 silage 40 lbs., ground oats 5 lbs., 

 ground peas 6 lbs 



Kation 2: Timothy hay 15 lbs., corn 

 silage _5 lbs., malt sprouts 2 lbs., 

 brewers' grains 3 lbs., Buffalo 

 gluten feed 3 lbs 



Lbs. 



16. 1 



16.2 



Pro- 

 tein. 



Lbs. 



2.21 



2.24 



C W°' V„t Organic 



Lbs. 

 13.31 



13.1 



Lb. Lbs. 

 0. 57 16. 



.83 



16. 22 



Pro- 

 tein. 



Lbs. 

 2.14 



Carbo- 

 b.y. 



ill atrs. 



Fat. 



IM. Lbs. 

 12.89 ! 0.9! 



2.25 12.96 1.01 



Since the results agree so nearly, the conclusion is drawn that when 

 the value of rations is calculated by the ordinary tables of composition 

 and digestibility the actual value of the rations is shown. 



The relative n utritive effect of rations from unlike sources (pp. 712-720). — 

 In the rations mentioned above the total amounts of nutrients as 

 expressed in terms of protein, fat, and carbohydrates are about the 

 same, yet it does not follow that the rations have the same actual feed- 

 ing value, since the nutrients in different feeding stuffs are present in 

 different forms. The authors determined the relative amounts of the dif- 

 ferent carbohydrates in the nitrogen free extract of the various feeding 

 stuffs used, assuming all the carbohydrates soluble in malt extract to be 

 starch and sugar. The results follow: 



Composition of carbohydrates in feeding stuffs. 



Using the above values, it is calculated that ration 1 furnished 8.21 

 lbs. of starch and sugar, 5.33 lbs. of other nitrogen-free extract, and 

 4.52 lbs. of fiber; and ration 2 furnished 5.43 lbs. of starch and sugar, 

 8.48 lbs. of other nitrogen-free extract, and 6.53 lbs. of fiber. Assum- 

 ing that all the sugar and starch in both rations was digestible, it is 

 calculated that ration 1 contained 1.99 lbs. of digestible nitrogen-free 

 extract other than starch and sugar, and 2.67 lbs. of digestible fiber, 

 and ration 2, 3.61 lbs. and 3.92 lbs., respectively. 



