BREEDING DAIBT CATTLE 



229 



illustrate the variation in the quantity, we may compare 

 average production of all cows in the United States with two 

 of the high-producing ones. It should be borne in mind that 

 this is not a comparison of the poorest and the best, as we 

 have no record of the poorest cows : — 



Average yearly production per cow in the United States 



Production in one month 



From the table we note that the monthly record of our high- 

 producing cows is approximately equal to the average yearly 

 • record of all cows in the United States. Colantha 4th's Johanna 

 yielded 27,432 pounds of milk in one year, or approximately 

 eight times that of the average cow. 



MILK-RECORDS 



Record of performance among dairy cattle constitutes the 

 only method of determining their value. Without such records, 

 we would not be able to choose the very high- or the very low- 

 producing, or the profitable from the unprofitable animals. At 



