174 Report of Fakmees' Institutes 



any consideration at all, the total digestible nutrients are much 

 cheaper in the high protein foods than in the low protein foods. 

 Statement 1 will be considered first. Total digestible nutrients 

 should first be defined. To find the total digestible nutrients in 

 any food add together the digestible protein, the digestible carbo- 

 hydrates, and 2.25 times the digestible fat. 



1. COST OF TOTAL DIGESTIBLE NUTRIENTS 



The cost of one pound of total digestible nutrients has been com- 

 puted in the following feeds : 



Table I 



Total dig. Cost of 1 lb. 



nutrients Cost of of total dig. 



Feed in 1 ton one ton nutrients 



1. Distillers' dried grains 1,778 $32 96 $.0185 



2. Gluten feed 1, 614 30 07 . 0186 



3. Corn meal 1,676 3109 .0186 



4. Hominy feed 1, 692 31 59 .0187 



5. Cottonseed meal '. 1, 564 32 29 . 0206 



6. Barley 1,588 33 19 .0209 



7. Wheat bran 1, 218 27 26 . 0224 



8. Oil meal . . . : 1, 558 36 75 . 0236 



9. Ground oats 1, 400 37 55 . 0268 



In Table I, column 1 is the digestible protein + the digestible 

 carbohydrates + (the digestible fat x 2.25) in one ton of each of 

 the feeds named. The data is from '' Feeds and Feeding," fifteenth 

 edition, Henry and Morrison. Column 2, the ton price is the 

 average price for the year October, 1914, to September, 1915. 

 The quotations used were for the fifteenth of each month as quoted 

 wholesale by a Buffalo, IST. Y. firm in carlots f. o. b., Rochester, 

 N. Y., Syracuse, IST. Y., or Baltimore, Md. Column 3, the price 

 of one pound of total digestible nutrients, is obtained by dividing 

 column 1 into column 2. 



The amounts of total digestible nutrients in one ton of each 

 food is what is actually paid for in each case. Column 3, the 

 cost of one pound of total digestible nutrients, gives a true relative 

 basis for the choice of feeds to supplement those already at hand. 



It also may throw some light on the question of selling some 

 home-grown feeds and purchasing others to take their places. 

 From column 3 it is seen that during the year 1914-1915 dis- 



