340 PROFESSOR LISTER ON THE GERM THEORY 
time when the glass garden was stocked (on the 11th September), viz., that in 
the first urine glass the filamentous form of growth, which had been entirely 
suspended four days after inoculation, was again present in abundance, forming 
little woolly tufts, which studded the side of the glass. In other words, the 
urine had been restored to a condition compatible with the filamentous 
mode of development ; and the natural explanation of this occurrence is, that 
the substance which exerted the modifying influence upon the organism, stimu- 
lating the corpuscular while checking the filamentous formation, was a volatile 
product of fermentation of some constituent of the liquid present in limited 
amount, and that when this constituent was exhausted, and the volatile product 
had escaped, the organism was again at liberty to form filaments, as it would 
have done if placed in fresh urine. 
The investigation with the “glass garden” had thus abundantly proved that 
the filamentous fungus seen in the glass of PAsTEuR’s solution, the pairs of oval 
vacuoled corpuscles of the primary scum in urine, and the spherical nucleated 
cells of a later period, were one and the same organism, modified by circum- 
stances ; while in the last-named variety we have another example of a plant 
presenting for weeks together the character of a pure and unmixed Torula, 
which, had I seen it only in that condition, I should have considered as much 
entitled to that generic name as the yeast plant, yet rigidly demonstrated to be 
a conidial development of a filamentous form. Comparing it with the Torula 
Ovalis, there is this curious difference between them, that whereas in the latter 
fresh urine is a medium in which the toruloid form especially flourishes, the 
filamentous growth making its appearance in it only when the liquid has been 
altered by the fermenting influence of the organism, the converse is the case 
with this plant. The present species, like the Torula Ovalis, failed to effect the 
ammoniacal fermentation of urea, the contents of the second urine glass being 
found still sharply acid on the 5th of November, ten weeks after inoculation. 
Yet it is, as we have seen, an energetic putrefactive ferment of some of the 
urinary constituents, and on this account is attended with considerable interest. 
And as the remarkable naked eye appearance of the scum which it forms in 
that liquid when altered under its agency, and the toruloid character of the 
constituent cells, appear to furnish sufficiently definite specific characters, it 
seems desirable that it should be named, and I have suggested for it the title 
Oidium Toruloides. 
Some other points observed in the investigation of this plant appear of 
sufficient interest to be placed on record. One is, that the spherical toruloid 
cells of the scum of the second urine glass, when introduced into a fresh glass 
of PasTEur’s solution, produced none of the purely filamentous growth such as 
resulted from the inoculation of the two previous glasses of that liquid with 
the filamentous form of the organism, any threads met with being only of a very 
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