138 Agricultural Experiment Station, Ithaca, N. Y. 



In the first three trials the milk was allowed to run from the 

 receiving tank at fuU head. With the water at thirty-six degrees 

 F. and using about thirty per cent more water than milk, the 

 cooler reduced the milk to fifty degrees F. a I ihc rare of 550 

 pounds per hour. In the last five trials the cock of the receiving 

 tank was partially shut off so that the milk ran slower, the 

 water running the same as before. Under these conditions with 

 water of the same temperature and using three timcis as much 

 water as milk, we were able to cool the milk to forty-three degrees 

 at the rate of 300 pounds per hour. We think this machine is 

 capable of bringing the milk very near to the temperature of the 

 water at the rate of from 250 to 300 pounds per hour. 



The tests of the Champion aerator were made by filling the 

 cooling tank with water and ice. This was done in all .-ases some 

 little time before the aerator was used in order that the whole 

 machine might be cooled down to the temperature of jnelting ice. 

 A quantity of milk was then weighed and the tima noted Avhich 

 it required to pass thi'ough the aerator; the teini)eratur:' of the 

 milk being taken, both before and after the aeration. The details 

 of the tests are shown below: 



