142 pTtTDIES ON FERMENTATION. 



author of wliich, Dr. Fitz, communicated it to the Chemical 

 Society of Berlin in 1873. In section II., page 48, this author 

 explains his observations in a manner conformable to our 

 own views, as may be seen from the following passage of the 

 memoir : — 



" In the presence of oxygen, the ferment of miicor develops 

 into a mycelium and consumes the sugar ; in the absence of 

 oxygen, on the other hand, the spores develop into ferment of 

 miicor, that buds and decomposes the sugar into the products of 

 fermentation. 



" The properties of 7nncor mucedo in a fermentable liquid, in 

 the presence or in the absence of oxygen, accord perfectly with 

 the theory of fermentation established by Pasteur in 1861 

 (Compfes rendus de I'Academie des Sciences, t. Hi., p. 1260). 

 According to this theory a fermentative fungus needs oxygen 

 for its development ; if it finds any free oxygen it utilizes the 

 whole of it, assimilating one part of the sugar and burning 

 the other ; whilst in the absence of free oxygen, the fungus 

 appropriates what it requires from the sugar." 



