TO4 STORRS AGRICULTURAL EXPERIMENT STATION. 
The feeding experiment extended from November 20 to 
March 20. It included four periods of thirty days each, and all 
of the cows (9) were fed a uniform ration during each of the 
periods. The herd had a wide ration during the first and the 
last periods, while the rations for the two intervening periods 
were narrow. ‘The average of the rations actually eaten in 
periods 1 and 4, and in periods 2 and 3, will be found in 
table 13. From this it will be seen that the narrow rations 
averaged about two and one-half pounds of digestible protein 
per day, while the wide ration contained about one and one- 
half pounds. In this table the effect of the two rations on the 
yield of milk, butter-fat, and solids, and on the percentages of 
fat, solids, and solids not fat is also summarized. ‘The average 
daily yield of milk for the nine cows during periods 1 and 
4 (wide rations) was 15.0 pounds, and for periods 2 and 3 
(narrow rations), 15.7 pounds. ‘The average percentage of 
fat in the milk was 4.48 per cent. for the wide rations, and 
4.94 per cent for the narrow rations. ‘The proportion of fat in 
the total solids was also increased when the narrow rations 
were fed. In the following table, taken from the report of this — 
experiment, are given the average composition of the milk of 
all the cows for each period, and the proportion of fat in the 
total solids. 
Results of cow feeding experiments by the Pennsylvania 











Station. 
a | & 41 ee 
a } Pai hiee Por es 
PERIOD. D 8 . Pe a | A nee A "0 
Sm | “BS = 3 feel ON 
fo} v Hw vy ae 
meee a Ae Boa 
Lbs. % % % % 
1. Wide, - = = - 1.525) 1:06.65 |, 4.00 | 13. 1t.) 9 reore seme 
2. Narrow, : ~ ete $52.62 1-123. 9 la 74 tA O14 ogee 
3, Narrow, ane - - 2.38 | T:4.4 | 5.13 114040.) 38 260 aeore 
A. Wider =< owes - 1.§2;|} 1:6.7- | 4:87-4/14.02 | 34. 66 Oo 
Average of 1 and 4 (wide), - 1.52 | 1:6.65 | 4:48 | 13.56 | 32.79 | (580 
Average of I and 3 (narrow), 2.50: |'1:4.15.) 4.98°|14.25 }1g4045 ee Ope 

“From the table it appears that the narrower nutritive ratios tended to increase 
the per cent. of fat, of total solids, and of nitrogen, and the proportion of total 
solids that are fat. * ‘a * of * The fat content of the milk 
increased more rapidly when narrow nutritive ratios were fed than did the 
other solids.” 

