Domestic science, a text in cooking and syllabus in sewing, prepared for use in the Kansas City elementary schools, yet eminently fitted for home work (1911)
Johnson, Gertrude Tacy, 1856- · Kansas city, Mo., the Burton publishing co. · leaf 50
20. The Acid formed in milk is called lactic acid; fromthe Latin, lactea; milk. The germs which form it are calledlactic bacteria. These form the acid from the sugar in themilk, as vinegar is formed from sweetened water or fruitjuices; but the processes differ, and the periods of time re-quired to… … Fig. 13. Figure 13, is a group of vinegar-producing bacteria. The souring of milk is a natural process; one thatshould be expected after it has become a day or two old, 46 DOMESTIC SCIENCE and one that should be desired; for if the milk docs notsour, it will putrefy. Sour milk is wholesome, and…
Cookery · Sewing · Cbk
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
