. Plants and their uses; an introduction to botany. Botany; Botany, Economic. 0 ^ ^'k k III. Fig. 151.—Yeast (Saccharomyces cerevisice, Yeast Family, Saccharomyceta- cece). a, a single beer-yeast plant; greatly magnified; h, same sending forth a bud-like protrusion; c, same with bud more developed and a second one appearing; d, a colony produced by such budding without separation; e, a yeast plant divided into four within the en^'eloping wall; /, a plant dividing into two, each with a wall of its own, and thus able to resist adverse conditions for a long while; g, a cluster of four such resist
. Plants and their uses; an introduction to botany. Botany; Botany, Economic. 0 ^ ^'k k III. Fig. 151.—Yeast (Saccharomyces cerevisice, Yeast Family, Saccharomyceta- cece). a, a single beer-yeast plant; greatly magnified; h, same sending forth a bud-like protrusion; c, same with bud more developed and a second one appearing; d, a colony produced by such budding without separation; e, a yeast plant divided into four within the en^'eloping wall; /, a plant dividing into two, each with a wall of its own, and thus able to resist adverse conditions for a long while; g, a cluster of four such resistant plants, one of which upon the return of favorable con- ditions is producing a budding colony; h, such a colony farther ad- vanced. (Luerssen, Reese.)—Beer yeast, the form here shown— used not only for beer but for bread—is not found wild; but the closely similar wine yeast occurs regularly upon the surface of grapes and (in its resistant form in the soil of vineyards) so does not have to be added to the grape "must" in making wine. The plant is very pale brown or colorless. Fig. 152.—Vinegar Ferment (Bacterium aceti, Rod-germ Family, Bacteria- cem). a, ordinary form of plant, grouped into chain-like colonics, -'^i'"'; 5, an irregular form occurring under very adverse (Migula.) —The plants are colorless, and form about themselves a mass of jelly which constitutes the "mother" of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sargent, Frederick Leroy, 1863-. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
