i6 



The chief feature to be noted in studying the above records is the 

 fluctuation in the amount of milk produced by the same cow in differ- 

 ent years. A high production one year is likely to be followed by a 

 low production the following year. This is quite often due to differ- 

 ent intervals of calving. Some cows, on the contrary, give a very 

 even yield for a number of years, due largely to regularity in calving. 

 It should be noted further that only one cow has had seven con- 

 tinuous yearly records ; after a few years something is likely to happen 

 rendering an animal unsuited for further service. A number of heif- 

 ers of our own raising have been in milk from three to six years 

 and bid fair to be of use for some time to come. 



TABLE VI. 



Summary of Yield. 



The records of these 131 cows show that the average yearly yield 

 was substantially 6000 pounds of 5 percent milk, equivalent to 356 

 pounds of butter. This is a very satisfactory record for either a grade 

 or pure-bred Jersey herd. It must be remembered that the animals 

 were selected, well cared for and intelligently fed. Comparatively few^ 

 herds kept under conditions usually prevailing would have reached so 

 high a production. 



