FROM THE PRACTICAL VIEWPOINT 



above it. Outside this core, and closely fitting 

 it, is a shell which revolves around it. Into this 

 shell the eight pipes from the various holding 

 tanks are fastened, and they are so placed that as 

 the shell revolves each pipe is in turn brought op- 

 posite to the opening into the inner core. The 

 milk is thus admitted to the bottom of each hold- 

 ing tank in turn. As the shell continues to re- 

 volve each pipe in the outer shell passes in turn the 

 inner opening and the milk supply is thus shut off 

 from each particular tank, and so remains until the 

 shell has nearly completed its revolution. The pipe 

 opening from the holding tank then comes oppo- 

 site to another opening in the inner core, which 

 extends only a short distance into the core. This 

 opening turns downward and is connected with a 

 pipe, which discharges the milk to the cooler. Thus 

 it is seen that each tank is filled in turn and is in 

 turn discharged automatically. The same method 

 must be employed for arriving at the minimum 

 holding time as that used with the device illus- 

 trated in Fig. 20, namely, the time of revolution 

 must be reduced by 25 per cent. 



The exact holding time may be arrived at in 

 another way, namely, by carefully noting the 

 103 



