RECENT PROGRESS IN PHYSICS. 



387 



the jar, and the same quantity of electricity transferred to the elec- 

 trometer, whose divergence thus received a corresponding increase. 

 In this manner the charge of the electrometer was constantly increased, 

 and the corresponding divergence of the pendulum observed. 



These charges were continued to 7, 8, or 9 ; the electrometer was 

 then discharged and the same process repeated. 



That, during the whole period of the experiment, the strength of 

 the electrical charge of the jar did not diminish perceptibly, is shown 

 by the numbers of the following table, which contains the results of 

 8 experimental series: 



The first vertical column contains the quantities of electricity trans- 

 ferred to the electrometer; each of the following vertical columns con- 

 tains the correspondirg divergences as determined by eight consecu- 

 tive series of experiments ; the last column contains the means of the 

 (Mvergences found for each quantity of electricity. 



Fig. 30. 



