Histological demonstrations : a guide to the microscopical examination of the animal tissues in health and in disease, being the substance of lectures delivered by George Harley / edited by George T. Brown.

  • Harley, George, 1829-1896.
Date:
1876
Catalogue details

Licence: Public Domain Mark

Credit: Histological demonstrations : a guide to the microscopical examination of the animal tissues in health and in disease, being the substance of lectures delivered by George Harley / edited by George T. Brown. Source: Wellcome Collection.

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    Algje. Cryptococcus cerevisise, Torula cerevisiae, Yeast-plant.— This plant is found in fermenting fluids, in yeast, and in sac- charine urine. It occurs also in the mouth, oesophagus, and stomach. It consists of numerous round or oval cells, containing in their interior minute granules resembling excessively minute oil globules. The mode of propagation is by a species of budding; each cell gives forth one or two minate projections, which become perfect cells, and again develop other buds. In a few hours a row of five or six cells will be developed from a single one. When found in any fluid, it indicates the existence of sac- charine fermentation. Sarcina ventriculi is composed of small square bodies, like wool-sacks, heaped together to form square masses, which consist of four, eight, sixteen, or sixtj^-four cubic cells (gonidia). Each cell is marked by cross lines or depressions, which apparently divide it into four portions. Sometimes the cells are round, oval, or even triangular, but always with the corners rounded off. Fig. 218. Torula cerevisise.