[boyle] radioactive EMANATIONS IN LIQUIDS 



Effect of Temperature. 



79 



The effect of rising temperature is to diminish the absorptive 

 power, as in the case for radium emanation and for gases in general. 



To illustrate, the single case of petroleum at temperatures of 98°C 

 and 0.3°C is shown. (Figure 2, Table II.) The " ionization — speed of 

 air flow " curves give an idea of how much more readily the liquid 



32 



24 



/6 



tJ 8 



ruovj IN c.ciscc 

 FIG. 2. 



can absorb at the lower than at the higher temperature. It is not 

 intended that these curves should be compared with those of Fig. 1, 

 for the air flow circuit in this case was made up differently. No non- 

 absorptive curve is shown. 



TABLE IL 



Petroleum at different temperatures. 

 Multiply currents by 195 x 10~^* for amperes. 



At 0.3° C 



At 98°C. 



