898 



DE. G. C. SIMPSON ON THE ELECTRICITY OF 



given by the splashing of distilled water. A layer of salt water 2 cm. deep was 

 therefore placed in the bottom of the tray and into this the drops fell after breaking 

 up on the jet. The following test was then made : The funnel was slightly moved to 

 the side so that the drops of distilled water fell directly with their full velocity on to 

 the salt water on the bottom of the tray, and the blast was also set in action in order 

 to remove the air containing any charge separated from the water on splashing, and 

 so to produce the largest Lenard effect possible. 

 The result was as follows : 



TABLE IX. 



This shows that the Lenard effect due to splashing on the bottom of the tray 

 produced a slight negative charge, and so it may be concluded that the positive 

 charge found in the experiments in which the drops were broken on the air jet was 

 not due to splashing on the bottom of the tray. 



It would therefore appear justifiable to assume that the whole of the charge 

 measured in the apparatus under discussion was due to the breaking up of the drops 

 on the air jet. 



The following table gives the results of six experiments : 



TABLE X. 



