A practical treatise on urinary and renal diseases : including urinary deposits . hous-looking deposit at the bottom of the growth of this vegetation in urine has been admirablydescribed by Hassall (Med. Chir. Trans., vol. xxxvi. p. 32)with the conditions which favour and impede its urine must be acid; when it becomes ammoniacal, thefurther growth of the plant is arrested, and it soon presence of some organic matter is another necessity;but as the urine is never absolutely free from organic matter(albumen, epithelial scales, pus, &c), it may be said that
A practical treatise on urinary and renal diseases : including urinary deposits . hous-looking deposit at the bottom of the growth of this vegetation in urine has been admirablydescribed by Hassall (Med. Chir. Trans., vol. xxxvi. p. 32)with the conditions which favour and impede its urine must be acid; when it becomes ammoniacal, thefurther growth of the plant is arrested, and it soon presence of some organic matter is another necessity;but as the urine is never absolutely free from organic matter(albumen, epithelial scales, pus, &c), it may be said thatevery acid urine forms a fitting nidus for the mould fungus. COXFERVOID VEGETATIONS. 163 Albuminous acid urines are those in which the plant growsmost luxuriantly. 3. Yeast or sugar fungus (Torula cerevisiae).—This vegeta-tion has precisely the same phases of development as the mouldfungus ; and in the phases of sporule and thallus it is not easyto distinguish the one from the other ; but the aerial fructifi-cations of the two are wholly different (Figs. 39 and 40). That. Fig. 39. Yeast fungus. Sporules and threads of thallus. of the yeast fungus (which grows luxuriantly in diabetic urineexposed to the air at a moderate temperature), instead of a tuftof branches has a spherical head. When the plant has attainedits full fructification, the floating bed of thallus appears dustedover with a brown powder. Under the microscope, the brownmatter is found to consist of the spherical heads full of , when ripe, burst, and discharge their sporules, whichsink to the bottom of the glass and form a white settling likeso much flour. Dr. Hassall believes that the growth of the sugar fungus inurine is a certain proof of the existence of sugar. Whether itbe so or not, is scarcely capable of absolute proof, until it shallhave been shown that the natural urine is wholly free fromtraces of sugar. The yeast fungus may grow even to full m 2 164 ORGANIC DEPOSITS. fructification, as I h
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