244 ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 



cooler is used which holds a volume of water to which ice has 

 been added. A cooler should be simply constructed, having all 

 parts easily accessible for cleaning. 



It is desirable for every dairy farm to have a never-failing 

 cold spring, a good well, or a supply of ice, so that means for 

 cooling milk will always be at hand. If ice is stored near the 

 milk room and the business is large enough to justify the ar- 

 rangement, a circulation of brine through pipes below the ice 

 and through the milk cooler may be arranged, the cold brine be- 

 ing forced about the circuit by a pump. The drippings from the 

 ice may also be used. The cooling of milk should receive the 

 same attention in winter as in summer. 



STORING OF MILK. 



A large portion of the milk delivered to factories is first held 

 on the farm from twelve to twenty-four hours and some times 

 two or three days, and the conditions under which it is stored 

 during this time have an important influence on its quality. Low 

 temperature does not kill bacteria; it only renders them torpid and 

 they regain their activity as soon as they are again surrounded 

 by warmth; therefore it is as necessary to hold the milk at a low 

 temperature as to cool it in the first place. As in cooling, for 

 certain uses of the milk, very low temperatures are unnecessary, 

 it should not be allowed to freeze. 



The usual way of storing milk is to set the cans in tanks of 

 cold water. Care must be taken to have at least three times as 

 much water as milk and to have it higher on the outside of the 

 cans than the milk is inside. If the milk is higher than the 

 water a thin layer on top is not cooled so much as the rest, 

 fermintation progresses there, and as soon as the can is moved 

 this layer is disturbed and distributes a supply of bacteria through 

 the remainder. The tank should be covered to confine the cold 

 air, and when necessary, ice should be placed on the cans and in 

 the water. If it is attempted to keep the cans cold by placing 

 blocks of ice on them when grouped on the floor, a blanket 



