52 



The milk for this last period was, as will be seen, con- 

 siderably richer in butter-fat than during Experiment C. 

 Only in one instance was the morning milk here under the 

 standard, viz., in the week ending February 21, and it is 

 interesting to observe that it was the same in both lots on 

 that occasion. As far as the general average of butter-fat is 

 concerned, the advantage is in favour of lot I., which gave 



TABLE XVI. AVERAGE PERCENTAGE OF BUTTER-FAT 

 IN MILK FOR 12 WEEKS. 



General average for day's milk 

 Total butter-fat per day 



* Out of a possible of 8J. 



lot I. 



3-50 

 4-92 Ib. 



Lot II. 



3-44 

 5-06 Ib. 



an average of 3'5 per cent, as against 3'44 for lot II., a differ- 

 ence in favour of the former of '06 per cent. The difference 

 between the two lots is chiefly in the evening milk. This 

 result suggests an improvement in the quality due to the heavy 

 ration. The difference, however, is too small to be decisive, 

 and the higher percentage of butter-fat in lot I. might easily 

 be due to the greater falling off in the milk yield during the 



