Fig. 4 — Gutter alleyway swept in 3.10 man minutes (above) 



in 0.48 man minutes (below). 



Gutter alleyway scraped 



ment was reduced from 6.3 to 4.2 

 minutes. The seven cows with un- 

 satisfactory response were reduced 

 from 7.3 to 6.1 minutes. 



These data indicate that about 40 

 per cent of the problem cows, pro- 

 vided they are not over eight years 

 of age and have normal healthy 

 udders, can be trained to milk out 

 satisfactorily. 



10 



The chief difficulty in milking 

 quickly was found to be the oper- 

 ator's failure to get back to the 

 cows at the end of three minutes of 

 milking and massage the udder in 

 the process of machine stripping. 

 Some cows give down about 75 per 

 cent or more of their milk in the 

 first three minutes, and then the 

 nilk How is retarded. If the oper- 



