BUTTER-MAKING. 



globules, at ordinary living-room temperature, are present in 

 milk in a liquid form. Cooling the milk to a very low tern- 





^^> 

 '<^ = _„« 



oOO( 



o" o o 



J^^^^P"itwi--,.-ai°,- 



So 





oO' 





55b .;; 



fe*a o W)°° 









O o^^Oo 



Fig. 1. — Microscopical appearance of different kinds of milk Magnified 

 300 times. (U. S. Farmers' Bui. Xo. 42.j 



iperature (about 50° F.) hardens them. When the globules are 

 caused to unite, as in churning, they also sohdify. 



The size of the fat-globules is ^■ery minute, and varies con- 



