Glucose and Mannitol by B. coli communis. 



87 



of their formation, and are therefore probably produced from a common 

 parent substance. 



(3) The average drawn between succinic acid and acetic acid corresponds 

 very closely with the average between acetic acid and alcohol, from which it 

 would appear that the three substances are related to a common intermediate 

 substance, and are produced by the same enzyme action. 



(4) The curves for the production of alcohol and succinic acid closely 

 follow one another, indicating that the oxidation of a part of the sugar to 

 succinic acid, and the reduction of a part of the sugar to alcohol, are 

 complementary processes. 



48r 

 44 

 40 

 36 

 32 

 28 

 24 

 20 

 16 

 12 

 8 

 4 



P - 



Fig. 3 



Lb5Z 2i69 ?-|9 ^ 6-i6 7-i4 9i6 (7,0?) 



Concentration of K2SO4 in grams per Litre 



