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176 pages, Hardcover
First published January 1, 1920
Your hand is the best instrument for mixing. The only ingredients required are flour, water and yeast, with a pinch of salt for flavor [Chapter 1: Basic Yeast Breads, p14]
Most starters are begun with a starchy ingredient, water and, in some cases a bit of sugar. Traditionally, this medium is left to inoculate itself by picking up wild yeasts and bacteria that are in the flours and in the air. [...] But wild yeasts are tempermental, and such cultures frequently do not take.
A more reliable method for starting a culture is to inoculate a medium with commercial yeast. However, the hardy commercial strain will crowd out most of the wild yeasts and, because its metabolic by-products are not as strongly flavored, the starter will not produce the distinctive results of traditional cultures.
Once established, a sourdough starter will last indefinitely if it is refrigerated and its yeasts kept supplied with nutrients and free of contaminants. After each use, but at least every two weeks, replenish the starter with flour and water. [Introduction, p10]