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AGRICULTURE FOR COMMON SCHOOLS 



called whole milk. After the fat has been removed it is called 

 skim-milk. It is not easy to separate the fat alone, so that 

 some milk is also taken with the fat, and this is called cream. 

 Cream is milk with a very large per cent, of fat in it. When 



71. A MILKING MACHINE AT WORK 

 Many large dairies are using these machines. They lessen the labor of milking 

 and keep the milk clean. The machine is operated by compressed air 



milk is allowed to stand in a vessel for some time the globules 

 of fat gather at the surface and form the cream. A low tem- 

 perature is favorable to the rise of the fat globules. 



There are four methods or systems of separating the fat or 

 cream from milk; namely, by the use of shallow pans, by 



