EFFECTS ON ALCOHOLIC FERMENTATION 



213 



A microscopical examination of portions of the mixture ex- 

 posed to the radium of 1,500,000 activity, and from the control mix- 

 ture, gave the following data concerning reproduction, as indicated by 

 the number of yeast-cells having buds in the field of the microscope 

 (B & L, 1 obj. and No. i ocular). Five counts were made as follows : 



RaBr^ 



1,500,000 Control 

 30 12 



25 12 



25 25 



19 It 



32 14 



131 



, 26,2 



Av, 



74 

 14.8 



12 3 



Days 



Fig. 61. Relative Rates of Alcoholic Fermentation in Saccharimeters that have 

 been Several Times Exposed, in Previous Experiments, to Radium of 1,500,000 and 

 10,000 Activities. 



