2IO 



EFFECTS ON ALCOHOLIC FERMENTATION 



In a repetition of Experiment 86, readings of the saccharimeter 

 scales were recorded as follows : 



Time 

 2:30 

 00 



30 

 00 



30 



RaBr, RaBr, RaBr.^ 



1,500,000 X 10,000 X 7.000 X 

 0.00 



•50 



1.60 

 2.60 



0.00 



.60 



2.10 

 4.00 



5-50' 



0.00 



.60 



I. So 

 4.00 



5-50' 



5:00 



3-85 

 4.70 



Radio- 

 tellurium 

 0.00 

 .40 

 1.50 

 3.00 

 5.10* 



Coated 

 Rod 

 0.00 

 .20 

 .60 

 1.20 

 2.50 



3-40 



Control 

 0.00 

 .10 

 .50 

 1.20 

 2.50 

 3-30 



Temp. 

 °C. 

 29 



22 



31 



31 



30-5 



30 



Fig. 58. Experiment 87. Acceleration of Alcoholic Fermentation hy Rajs from 

 Radium and Radio-Tellurium. 



Experiment 87 



Into 250 c.c. of a 5 per cent, solution of cane-sugar was placed 

 a piece of a Fleischmann's compressed yeast cake, weighing 2 gm. 

 The mixture was thoroughly shaken, so as to distribute the yeast 

 cells thoroughly throughout the liquid, and equal quantities were 

 then placed in each of five fermentation tubes. Radium preparations 

 were inserted into the fermentation tubes in sealed glass tubes as indi- 

 cated in the following table, and the following readings of the scale 

 were recorded (see also figure 59) : 



* Estimated. The surface of the yeast mixture has passed off the scale. 



