produced htj the Splashing of Mercury. 

 The results are plotted en fig. 3. 



Fig-. 3. 



471 



To3 













-mtTJrrjT 









tttt 























































JGO 























i^E 



±3 



*00 



loo 





11 



T-iiiM.i 







ff+i 



fe 





i 



HeigKt oj Dto^« 



H. 



v\. 



V 2 . 



P. 



P- 



N. 



538 



114 



596 



690 



180 



-175 



43 



114 



590 



520 



120 



-118 



324 



112 



596 



320 



60 



- 62 



21-5 



112 



590 



180 











148 



114 



600 



81 











6 



— 



600 















i 



The numbers under ^> show the current on the last electrode 

 with a field of about 590 volts, when the voltage V x is on 

 the first : they therefore represent the ions causing the second 

 rise in the saturation curve. For convenience we will call 

 these the slow positive ions. The last column shows the 

 total negative ions, and as is seen the slow positive are 

 practically equal in amount to the negative ions. If, there- 

 fore, the doublet theory is correct, the negative ions arise 

 altogether from the breaking up of doublets. This may 

 perhaps account for the current-voltage curve of the negative 

 ions showing no peculiarities, as the doublets may be broken 

 up in continuously increasing amount. The numbers show 

 that below a height of 21*5 cms. no slow positives are pro- 

 duced, and, as we should expect from the doublet theory, the 



