New York Agricultural Experiment Station. 71 



This improvemeiit in the teat cups has reduced the labor of 

 using the milking machine by doing away with the constant 

 changing of the cups during the milking process ; it has removed 

 the danger of using the wrong cup on a cow by mistake as some- 

 times occurred with the former cups and it has practically ob- 

 viated the misfits which were constantly occurring with cows 

 whose teats were midway between the available sizes or due to 

 the gradual decrease in size of the teat which occurs as lactation 

 progTesses. 



This improvement in the teat cups ig clearly shown in the 

 relative amounts of strippings obtained with the various forms of 

 teat cups. 



During the two weeks following April 4, 1907, seventeen cows 

 were milked with the machine equipped with the earlier form 

 of teat cup. At the beginning of this period the machine had 

 been in use four weeks, the cows had become fairly accustomed 

 to it and the operator had decided the question of the proper size 

 of teat cup. 



The milk obtained by hand stripping from these seventeen 

 cows during fourteen days amounted to 116.1 lbs. or a daily aver- 

 age of 0.49 lbs. per cow. In no case did the daily strippings fall 

 below 0.2 lbs. from any cow and with ten of them they equalled 

 or exceeded 1 lb. during one or more days. The maximum 

 weight of daily strippings from a single cow was 2.8 lbs. 



During the two weeks following May 10, 1912, ten cows were be- 

 ing milked with the same machines equipped with the newer type 

 of teat cup with which but a single size is necessary in milking 

 the entire herd. At this time the amount of strippings obtainable 

 in most cases from a single cow was too small to weigh upon the 

 available scales, the strippings from six of the cows being practi- 

 cally nothing. Accordingly the strippings obtainable from the en- 

 tire ten cows were collected and weighed together. The maximum 

 amount obtained in this way from the ten cows at any milking 

 was 1 lb. and it reached this figure on only one day. The average 

 daily strippings amounted to 0.11 lb. per cow or 0.055 lb. per 



