. Bacteria : especially as they are related to the economy of nature, to industrial processes and to the public health. Bacteriology; Bacteriology. i28 BACTERIA AND FERMENTATION Saccharomyces Cerevisice. Oval or ellipsoidal cells ; repro- duction by budding ; ascospores, rapidly at 30° C, slowly at 120 C, not formed at all at lower temperatures; film forma- tion, seven to ten days at 220 C.; an active alcoholic ferment, producing in a fortnight in beer wort from 4 to 6 per cent, by volume of alcohol (Jorgensen). This species is a typical English high yeast, possessing the power of " inver
. Bacteria : especially as they are related to the economy of nature, to industrial processes and to the public health. Bacteriology; Bacteriology. i28 BACTERIA AND FERMENTATION Saccharomyces Cerevisice. Oval or ellipsoidal cells ; repro- duction by budding ; ascospores, rapidly at 30° C, slowly at 120 C, not formed at all at lower temperatures; film forma- tion, seven to ten days at 220 C.; an active alcoholic ferment, producing in a fortnight in beer wort from 4 to 6 per cent, by volume of alcohol (Jorgensen). This species is a typical English high yeast, possessing the power of " inverting " cane- sugar previous to producing alcohol and carbonic acid. It is said to have no action on milk-sugar. Saccharomyces Ellipsoideus I. Round, oval, or sausage- shaped cells, single or in chains ; ascospores in twenty-four " 9 J 0 / I 0. S. Ellipsoideus S. Pastorianus hours at 25° C. (not above 30° C, not below 40 C). Grown on the surface of wort gelatine, a network is produced by which they can be recognized (in eight to twelve days at 330 C). At 13-150 C. a characteristic branching mass is produced. It is an alcoholic ferment as active as 5. cei'evisice. S. ellipsoi- deus II. Round and oval, rarely elongated, a widely dis- tributed yeast, causing " muddiness" in beer and a bitter taste. It is essentially a " low " yeast. Saccharomyces Conglomerate is a round cell, often united in clusters, and occurring in rotting grapes, and at the commencement of fermentation. Saccharomyces Pastorianus I. Oval or club-shaped cells, occurring in after-fermentation of wine, etc., and producing. 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 Newman, George, Sir, 1870-1948. London : John Murray
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