114 INVESTIGATION IN MILK PRODUCTION. 
ical at the time when the accident occurred, but being young, 
full of vigor and in good condition, she was soon again in 
good working order. 
It was intended to maintain a fixed ratio between grain 
and roughage for all the cows but in some cases a slight de- 
viation had to be made to feed each to her full limit. The 
directions were, to feed by weight five times as much corn 
silage as grain and half as much hay as grain, but in certain 
cases it was found necessary to deviate a little from this 
rule. On this account there is a slight variation in the aver- 
age nutritive ratio of the rations fed to cows in the same 
group. The rations were made up as follows: 
For Group I,—The grain was equal parts corn, bran and 
gluten meal. 
For Group II,—The grain was corn and bran, 4 parts each, 
and gluten meal 1 part. 
For Group III,—The grain was equal parts corn, barley and 
oats, except Letta, that received bran instead of oats. 
It was not known what thenutritive rotios of the sever- 
al rations would be because the composition of the feed 
stuffs was not known at the time the experiment began, but 
it was estimated that a ration containing 8 pounds of grain 
with the roughage accompanying it would contain of dry 
matter and nutrients as follows: 
TABLE XXXI.—Rations as Estimated. 






DIGESTIBLE NUTRIENTS 
5 Dry Nutritive 
RATION Matter x Ratio 
0 a Ether 
Protein (Oe Jele Extract 
I 19.32 2.00 10.55 as} alates} 
II 19.29 1.62 10.66 53 WET (CS! 
III 19.24 137 10.95 50 1:8.8 





The estimated nutrient content of the rations was not 
made from the American table of average composition of 
feed stuffs but upon Minnesota averages taking into account 
the character of the soil upon which the roughage was 
grown and the condition of the weather during the growing 
season. By chemical analysis the rationsshowed the follow- 
jing composition: 
