98 
TABLE XXI.— LITTLE CHANGE IN THE AMOUNT OF PROTEIN, 

Average of 91 rec- 
ords from cows 
averaging 4.5 
yrs. old and 4.9 
months in milk. 
For about 20 days before change 
aud 19 days atter. 


Before 
After 
Before 
After 
For 1000 Les. LIVE WEIGHT. 
Total 
digest- 
ible or- 
ganic 
matter. 
Lbs. 
14.6 
15-0 
Fat in 
milk. 

Digest- 





Rpporr or DEPARTMENT OF ANIMAL HUSBANDRY OF THD 
AVERAGE PER 
Day PER Cow. 

ible Fuel Stee Milk Fat in 
pro- value. yield. milk. 
tein. ratio. 
Lbs. Cal. Lbs. Lbs. 
2.01 '28,813) 1:6.8 | 21.1 -91 
2.03 |31,611) 1:7.5 | 20.7 -91 
Approxi- Dry Dry | ‘onae 
mate cost | matter | matterin matter In 
of food in food food for food for 
for one for one one Ib. each Ib 
Ib. of lb. of of milk of mitk. 
milk. milk. solids. solids. 
Cts. Lbs. Lbs. Lbs. 
ay bi 9 6.9 4.6 
10 10) (ein 5.0 

AN INCREASE OF PROTHIN. 
The average of 
rey 
273 
records, each of which covers a period 
when the amount of protein in the ration was increased, is 
shown in Table XXII. 
increase in fuel value. 
There was, on the average, also a slight 
The shrinkage in milk flow was about 
half as great as would normally occur. 
The very moderate rate 
of gain in live weight was somewhat increased by the change. 
