12 



the latter part of October, and using the monthly test for October in 

 calculating the pounds of fat. This is not strictly correct, but is near 

 enough for the purpose of comparison. During the last fifteen days of 

 November the cows were milked individually with the machine and the 

 weights and samples of milk were taken daily through the half month, 

 the same as in hand milking. This plan gives a more exact method of 

 comparison. 



Table Showing Relative Yield of Milk and Fat for Two-week Periods 

 during October and November, of ten cows. 



No. of Cow. 



Machine Milking, 

 15 days, Oct. 

 (calculated. ) 



Lbs 

 M. 



66....: 



69 



70 



78 



86 



87 



90 



96 



97 



102 



Totals and 

 averages 



442 

 217 

 300 

 457 

 255 

 285 

 345 

 285 

 435 

 255 



3,276 



7 

 Fat. 



3.5 



3.3 



5.1 



3. 



3.4 



3.1 



3. 



3.9 



4.2 



3.7 



3.61 



Lbs. 

 Fat. 



15.49 



7. IS 



15.30 



13.73 



8.67 



8.84 



10.35 



11.12 



18.27 



9.44 



118.39 



Hand Milking, 

 Nov. 1-1 5th. 



Lbs . 

 Fat. 



15.44 



7.92 



15.05 



16.54 



10.58 



9.95 



12.10 



10.94 



16 53 



9.92 



124.97 



Machine Milking, 

 Nov. 16-30th. 



Lbs. 

 Fat. 



12 98 

 7.03 



13.67 



14.57 

 9.75 

 8.27 



10.32 

 9.43 



14.36 

 9.52 



109.92 



The foregoing table shows an increase of 165 pounds milk and 6.58 

 pounds fat for the ten cows in the two weeks when milked by hand, from 

 November 1st to 15th, inclusive, as compared with the previous fifteen 

 days in October when milked with the machine. From November 16th 

 to 30th, when milked with the machine, these ten cows gave 384 pounds 

 less milk and 15.05 pounds less fat than they did the previous fifteen 

 days when milked by hand. 



If we average the milk and fat yields for the last fifteen days of 

 October and the last fifteen days of November, we get 3,166 pounds milk 

 and 114. 14 pounds milk fat as the average production of the ten cows 

 during fifteen days when milked with the machine. Comparing this with 

 the intermediate period, November 1st to the 15th, when milked by hand, 

 we have a difference of 275 pounds milk and 10.83 pounds fat, in favor 

 of hand milking, for the ten cows in fifteen days. 



The average percentages of fat were practically the same in all 

 three periods. 



