Xhw York Agricultural ExperijNient Station. 



73 



made observations upon the effect of variations in vacuum in 

 machine milking. The results of his study will appear later as a 

 bulletin of this Station but it will be of interest in this connec- 

 tion to note the effects produced upon the flow of milk and upon 

 the teats of the cow by somewhat wide changes in vacuum con- 

 tinued for only a relatively short time. 



Three cows which were in the later stages of their lactation 

 periods were used in this study and all of the details of the 

 machine milking were perfomied as usual except that the extent 

 of the vacuum was varied. The varying amounts of vacuum em- 

 ployed and the amounts of milk obtained are given in Table I. 



Table I. — Changes in Milking Machine Vacuum and its Effect on Milk 



Flow. 



