22 STORRS AGRICULTURAL EXPERIMENT STATION. 
Only a part of each of the various nutrients contained in 
any feeding stuff is digested by the animal. For our purpose, 
therefore, it does not suffice to know the kinds, amounts, and 
chemical composition of the feeding stuffs which the animal 
eats. We must also know the quantities of protein, fat, and 
carbohydrates that actually become available for use. The 
proportions of the different nutrients that can be digested 
depend upon the digestive powers of the animal and the char- 
acter of the feeding stuff. The average proportions of each 
ingredient of any feeding stuff which are found by experiment 
to be actually digested are commonly expressed in percentages, 
and in that form are designated as coefficients of digestibility. ! 
Coefficients of digestibility employed in calculating the digestible 
nutrients in the different feeding stuffs used 
zn these rations.* 







CARBOHYDRATES. 
Kinps oF Frepinc Sturrs. Protein, Fat. Nitrogen- 
free Fiber. 
Extract. 
% % % % 
Chicago gluten meal, - - 2 b 87* 88* of 33% 
Rockford gluten feed, - : A zZ Sa* 88* o1% BF 
Buffalo gluten feed, - » 2 : oa 88* oy 33+ 
Cotton seed meal, : . : 89* 100* 68* 33+ 
O. P. linseed meal, = - é : 86+ got 8ot 50+ 
Rye meal, - a 2 - 5 : 84* 64* 927 2am aa 
Corn and cob meal, - : is ‘ aoe 82% S46 28 
Wheat bran, : a - : x 78% 46% per Sat 
Wheat middlings, : : - : alee es $3 33% 
Fine wheat feed, - . 2 Z 70 85* O34 83m 
Corn meal, - : - - - - 76+ g2t 87+ 58+ 
Ground oats, : : - : - 78+ 84t cap, 26+ 
Corn ensilage, - z : - - 46* 80%) Se 269s. O77 
Corn stover, - - a 2 vie 52° 64* 66* 
Potatoes, - : “ £ A cs 44* (Sea gi* — 
Turnips, - £ . - S 2 84* Sin be 95 eae ear 
Hay (mixed grasses), - : bs : 54° a4” 63% See 
Bog hay, - : 2 - - = a5” 28* 60* 46* 
Oat hay, - 2 2 - 2 2 5s 61* sor 43° 
Wat straw,. - - : : : - aso Gi jpnex 43* 



* From results of American digestion experiments. 
+ From results of German digestion experiments. 
* For explanation of this subject, see articles on digestion experiments, and espe- 
cially those on the digestibility of feeding stuffs and the calculation of rations in 
the Report of this Station for 1893, pages 156 and 168. 
? New tables of average coefficients of digestibility have been published since this 
series of experiments was started in 1892, but the changes are slight, and in order to. 
have the rations comparable, the original factors have been retained throughout. 
The later results are referred to in the article on Nitrogenous Feeding Stuffs beyond. 
