12 Mr. J. C. Mottram and Dr. S. Russ. Susceptibility and 



received by the animals in these experiments may be obtained when it is 

 stated that a Sabouraud pastille placed at the centre of the wooden box 

 turned to the standard tint 1 B in 2| hours B in 45 minutes, -f- B in 

 2 hours). This radiation caused the leaf of the electroscope to fall at the 

 rate of about 300 divisions per minute. 



Preliminary observation showed that exposing a medium-sized rat for 



« 



DAYS 



Fig. 8. 



