To Increase the Fat in Milk. 



95 



It will be seen that while the second gain of the whole 10 cows in 

 the second period was almost exactly the same as the gain when the 

 first and fourth periods were compared with the second and third, 

 practically all of this gain was secured from five of the cows. 



The first five cows in the table below gave milk richer in fat by 

 more than one-half of one per cent in 1901 than in 1900, whereas the 

 remaining five gave milk of very nearly the same fat content in both 

 years. 



Table V. — Gain of the Individual Cows. 



Mention has already been made of the fact that there seemed to be 

 a tendency for the cows to give milk containing a lower percentage of 

 fat when they were returned to Mr. Gibson in the fourth period than 

 they had given in the first period. As to whether this was due to 

 the treatment the cows had received while at the university, we were 

 fortunate in having some evidence from the cows in the original herd 

 that had remained at Mr. Gibson's without change of treatment. 



When the cows were returned to Mr. Gibson in the early spring of 

 1903, there were still in his herd five of the original cows. A record 

 was kept of these cows during the season and it is therefore possible 

 to compare their records in 1900 and 1903 with those of the cows 

 that had been taken to the university. This record, so far as the 

 percentage of fat is concerned, is shown in the following table: 



