/ 



IMPORTANCE OF COW TESTING 129 



good cows and ten bad ones. An accurate account of 

 feed and milk production was kept: 



Ten most profitable cows. Ten least profitable cows, 



i $123.58 1 (Loss) $13.73 



2 116.96 2 1.62 



3 108.74 3 2.84 



4 108.10 4 3.85 



5 104.15 5 7-IO 



6 96.66 6 9.09 



7 95-59 7 10.27 



8 94.97 8 11. 14 



9 92.1 1 9 12.07 



10 92.02 10 J 3-57 



Total $1,032.88 Total $85.28 



From this table the reader will notice that a herd com- 

 posed of 10 of the best cows would yield a profit of over 

 $1,032. Compare with this the meagre profit of only 

 $85 that would come to the dairyman as a result of a 

 year's work with a herd composed of 10 of the poorest 

 cows, and there is at least one evident reason why the 

 farmer who keeps no record of the amount of milk pro- 

 duced and who thinks it of no importance to test the milk 

 for butter-fat fails to make dairying profitable. 



