8 



Comparison of Machine and Hand Milking for a Two-week Period 



when cows were on grass. ' 



From September 5th to i8th, inclusive, all the cows were milked by 

 hand. For two weeks previous to this, and for two weeks after, the 

 record of four of the cows milked regularly by hand is given, for com- 

 parison with the records of seven cows milked with the machine for two 

 weeks previous to hand milking- and for two weeks after hand milking. 

 No special tests were made of the fat content of the mhk. If we average 

 the periods before and after hand milking, we shall eliminate so far as 

 possible the effects of lactation. The yields of milk for the machine 

 milked cows are calculated in periods one and three by averaging three 

 weighings and multiplying the results by fourteen to obtain the pounds 

 of milk given in two weeks. In period 2, for the machine milked lot, 

 and in all three periods for the hand milked cows, the milk from each cow 

 was weighed morning and evening, daily. 



The table shows the weights of milk given in all three periods by 

 both lots of cows. 



Comparison of Hand and Machine Milking, August, September, and 



October, igo6. 



When we compare the four cows regularly milked by hand, averag- 

 ing periods 1 and 3 for comparison with period 2, we find that thev . 11 



