Dairy Herd Records. 



309 



VARIATIONS IN PER CENT OF FAT. 



From the original record we have taken the figures which 

 appear in the following table showing the extreme variation in 

 per cent of fat in each cows' milk during the year and the great- 

 est variation between two consecutive two-week periods. The 

 variation in per cent of fat in milk is, with most dairymen, a 

 knotty problem, and is sometimes a source of trouble between the 

 creamery man and his patrons. That variations occur is shown 

 in the table; why they occur would be hard to explain. 



TABLE V. — SHOWING EXTREME VARIATIONS IN THE PER CENT OF 



FAT IN THE MILK OF EACH COW DURING THE YEAR 



AND BETWEEN CONSECUTIVE TESTS. 



• With such wide variations in the per cent of fat in the milk 

 of the same cow, the lack of value of single tests should be ap- 

 parent. This is another illustration of the importance of keeping 

 the year's record of our dairy cows. 



