Table Shoiving Comparison of Yields from Machine and Hand Milking 

 for two-week periods in February and March. 



The foregoing- table indicates a gain in pounds of milk for the hand 

 milking- in three out of four cows amounting- to 79 pounds milk in 14 

 days, or an average of 19.7 pounds per cow in two weeks. Each and 

 all of the four cows gave an increased amount of fat during the period 

 when milked by hand amounting to a gain of 6.89 pounds milk fat in 14 

 days, or an average of 1.72 pounds fat per cow, which is equal to about 

 2 pounds butter per cow for the two weeks. Was this apparent gain 

 due to hand milking or to some other factor or factors? 



A similar experiment was made from March 30th to May 10th, with 

 cows Nos. 15, 56 and 76. From March 30th to April 12th, inclusive, the 

 cows were milked with the machine. Milk was weighed separately from 

 each cow every seven days, and composite samples were taken every 

 seven days for testing with the Babcock test. From April 13th to 26th 

 these three cows were milked by hand, milk was weighed and sampled 

 daily. From April 27th to May 10th, inclusive, they were milked with 

 the machine. 



Averaging the two machine periods, same as in the previous experi- 

 ment, and comparing the results with the hand milking, we find that the 

 average of the two periods where the three cows were milked by the 

 machine, was 1,085 pounds milk and 34.8 pounds fat for the three cows 

 in 14 days. During the fourteen days when milked by hand the same 

 cows gave 1,005 pounds milk and 33.71 pounds fat. Apparently at this 

 time these cows, two of which were the same as were used in the previous 

 experiment, gave 80 pounds more milk and 1.9 pounds more milk fat 

 when milked by the machine than they did in two weeks when milked by 

 hand. But again we may reasonably ask, was this difference due to 

 methods of milking or to something else? 



