Butter-making

Definition and stakes

H. W. Conn,  The Story of Germ Life

“ Most of the bacteria that are left in the butter soon die, not finding there a favourable condition for growth; some of them, however, live and grow for some time and are prominent agents in the changes by which butter becomes rancid. The butter maker is concerned with the ripening rather than with later processes.
The object of the ripening of cream is to render it in a better condition for butter making. The butter maker has learned by long- experience that ripened cream churns more rapidly than sweet cream, and that he obtains a larger yield of butter therefrom.
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Source: Gutenberg

Frederick S. Burch,  ABC Butter Making: A Hand-Book for the Beginner

“ To make good butter we must cool our milk rapidly. The sooner we cool it down to 47 degrees after it leaves the cow the better the butter will be. The old-fashioned way of setting the milk in shallow pans or crocks in the milk cupboard, which in summer was placed in the cellar and in the pantry in winter, is still kept up by a good many farmers, and this no doubt accounts for the steady production [Pg 24] of ten-cent store butter with which our markets are always overstocked. ”
Source: Gutenberg

T. D. Curtis,  Hints on Dairying

“ The more general practice is to "skim" just as the milk gives unmistakable signs of acidity, or thickens a very little on the bottom of the pan or can. A few prefer to skim the cream sweet, and still another few let the milk lopper. This wide divergence of opinion and practice shows how very imperfectly is the real philosophy of butter making understood; but, notwithstanding this, each one is usually very tenacious in his belief as to the superiority of his own practice. A few fancy butter makers say that the finest butter is made from sweet cream, raised in cold air by shallow setting. ”
Source: Gutenberg

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