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organism which is developed in company with the ferment-cells 
in fluids undergoing the alcoholic fermentation, and whose 
presence in the alcoholic fermentation of wort appears to be as 
universal a phenomenon as that of the ferment-cells themselves. 
It consists of rigid filaments, apparently destitute of spon- 
taneous motion, except a slight vibration, manifestly molecular; 
these filaments are at first straight, but afterwards become, 
for the most part, abruptly bent at an obtuse angle, generally 
at about a third of their length. They correspond nearly with 
the genus Bacterium, as defined by Ehrenberg, and though 
Ehrenberg’s definition may, perhaps, not strictly apply to 
them, it would seem more advisable to place them in the 
genus Bacterium than to construct for them a new one. The 
bodies in question possess considerable resemblance to the 
Bacterium termo of Dujardin: from this animalcule, how- 
ever, they differ in their greater length in proportion to their 
breadth ; in their entirely uniform diameter; in the angular 
bend presented by the full-grown filament; in the total ab- 
sence of all trace of transverse divisions in the mature. indi- 
viduals ; and in being entirely deprived of locomotion. The 
peculiar circumstances under which the Bacterium of the alco- 
holic fermentation is developed, suggested the specific name 
of cerevisie, under which the author proposed to designate it. 
Bacterium cerevisie is one of the first distinct organisms that 
shows itself in the fermentable fluid ; it appears-anterior to the 
ferment-cell, and precedes all sensible fermentation. It is it- 
self, however, preceded by excessively minute, spherical cor- 
puscles, and its formation was distinctly traced to the union 
in a rectilineal series of several of these corpuscles, originally 
quite distinct from one another. Ehrenberg explains the forma- 
tion of the chain-like filaments of the Vibrionidz by the sup- 
position of the imperfect self-division of an original monadic 
element. The origin of Bacterium cerevisiw, however, is cer- 
tainly such as is here described, and this organism is, therefore, 
truly compound. The excessive minuteness of the monadic 
element of the Bacterium renders it impossible to ‘form a sa- 
