11 



milkers, the results were 133 and 103 pounds respectively. The previous 

 day (18th) when these cows were milked with the machine operated by 

 *n expert the weights of milk were 134 and 92 pounds, from the two 

 groups respectively. 



The table shows the result from hand milking- for the 21st and 22nd, 

 in which the quantity of milk remained fairly uniform for each cow, 

 though there was a tendency towards an increase. On October 23rd these 

 cows were milked in the morning with the machine operated by our own 

 men, and in the evening by hand. The general tendency for the day was 

 downward. The total pounds of milk given by the ten cows on October 

 22nd, when hand milked, was 247 pounds. Next day when milked in the 

 morning with the machine, and in the evening by hand, the total pounds 

 of milk were 235, an apparent loss of 12 pounds on the ten cows. On 

 October 24th, all these ten cows were milked with the machine operated 

 by our own men. The total yield of milk for the day was 232 pounds — 

 another drop of three pounds from the previous day. The cows were 

 now milked regularly with the machine, two cows in one pail in the usual 

 way, until October 30th, when they were milked separately, and the milk 

 weighed morning and evening. Nine out of ten of the cows gave less 

 milk than they did October 24th. The total yield for the dav was 205 

 pounds — a drop of 27 pounds from the previous weighing on October 

 24th. At this weighing special note was made of the weight of "strip- 

 pings" given by each cow after milking as dry as possible with the 

 machines. Three cows gave no "strippings" after the machine either 

 morning or evening ; four cows gave from one to two pounds of strip- 

 pings af night; two cows p-ave 1 pound of "strippings" each at both 

 night and morning milkings ; and one cow gave 5 pounds in the morning 

 and 3 at night in the form of "strippings," out of a total yield for the 

 day of 2y pounds milk for this one cow. 



We are aware that these frequent changes from hand to machine 

 milking, and change of milkers by hand, is not good for the cows, but we 

 considered this was about the only way to get some data on the points 

 at issue. The evidence all seems to point in the direction of greater 

 milk yields by hand, but not much difference between inexperienced, hand 

 milking as compared with the machine. The weight of evidence also 

 seems to indicate that "manipulation" of the udder tends to prevent the 

 securing of the strippings by hand milking. However, this is a point 

 very difficult to determine. 



Machine vs. Hand Milking during October and November, 1906. 



From November 1st to 15th, inclusive, ten cows in the herd were 

 milked by hand. From November 16th to 30th, inclusive, they were milked 

 by machine. In order to compare the milking previous to and after hand 

 milking with the fifteen days of hand milking, we have calculated the yield 

 of milk for the last fifteen days in October based on two weighings made 



