18 
THE AGRICULTURAL EXPERIMENT STATION. 
5. All were feed wheat bran and alfalfa. 
6. The first lot of three cows were now changed to 
Indian corn meal, and the second to wheat bran, all 
receiving alfalfa. 
7. Reversed the conditions of the two lots of cows. 
8. All fed corn meal and alfalfa. 
The object in the last three periods, and others simi¬ 
lar, is the noting of variations in the quality of the milk, 
and to see if they correspond to the variation and quality 
of the foods employed. 
During all of this work we took samples of each 
cow’s milk, combining that of morning and evening, and 
analyzed them, as in the case of the four cows, by the 
Babcock method. Gravimetric analyses were frequently 
made by the Station Chemist, which do not correspond as 
well as we would wish with the other method employed, 
for the reasons heretofore stated. A careful record of the 
food eaten and water drank has been kept, and the cattle 
weighed daily between 10 and 11 o’clock. A great deal 
of attention and labor is connected with such an experi¬ 
ment. Analyses to the number of 706 have been made, 
recorded and averaged for this bulletin. It is believed 
that the experiment is not wholly without merit, and that 
the tables on the following pages are that interesting and 
comprehensive as to enable the reader, by careful study, 
to deduce from them information of much value. 
