THE DAIRY. 85 



period of unexampled activity in the dairy, not only with practical 

 workers but with scientific experimenters too, and the result is 

 seen in excellent and convenient pans, separators, creamers, 

 churns, butter- workers, milk- vats for cheese-making, and all the 



FIG. 17. REVOLVING Disc MILK-PAN STAND. 



rest of it, which go to make dairy work a far pleasanter occu- 

 pation than it ever was before. Let us see, now, what milk is, 

 and how it ought to be managed. 



Milk: its Composition. 



The mystery of milk-secretion in the system of the female 

 animal of the order Mammalia is not at present fully under- 

 stood, but various theories in reference to it have been put 

 forward. It is, or may be called, a metamorphosis of tissue 



