Relation of Repulsion to charges 257 



Tu. Oct. 26 [1773]. Th. 60. Com. - 6J. N. 2i. 



One of the balls E with its string weighed -5 gr. and its wire 1-4, the other 

 6 gr. and its wire 1-7. 



The two balls and strings together the weight of one of the strings, weighed 

 1-05 gr., the weight of the string about -05, the weight of the two wires together 

 was 3-2. 



When the wires were taken out of the balls E, and a communication made 

 between the two plates, while the electrifying wire rested on B, then when 



balls r sep. ] , balls E sep. -! 



U-o8 (.!] 



14 



The wires were put into balls E and the jars electrified while the electrifying 

 wire rested on B. When the balls E sep. 1-3 inc. the electrifying wire was lifted 

 up and the electricity of the plates taken away, immediately after which the 

 electrifying wire was let down and immediately drawn up again when the balls e 

 separated to 1-44. The electrifying wire being then let fall on B and suffered 

 to remain, the balls E separated to 1-14. 



The jars were charged, and the electricity diminished by alternately drawing 

 up and down the electrifying wire and discharging the electricity of the plates 

 till the balls e separated to 1-2; then letting the electrifying wire rest on B, 

 the balls E separated to 1-08. 



Wed. morn. The new heavy electrometer made with large wood ball and 

 pith ball separates when the balls E separate to 1-52, and new light electrometer 

 separates when the balls e separate to 1-44. 



When balls e separate to 1-44, balls E separate to -96. 



The new heavy electrometer above mentioned separates about J or J inch 

 when old light cylinder electrometer just separates. 



Result of these experiments. 



Balls E without weight separate .-\ farther than balls e with the same degree 

 of electrification. 



1*22 



If balls separate with i part of redundant fluid, balls of \ weight 



separate with A part of redundant fluid. 

 1-25 



If balls of given weight separate 1-5 with given degree of electrification, 

 balls of 4 times weight separate -96, therefore if balls of given size are electrified 



in given degree, the distance to which they separate is inversely as -- power 

 of their weight. 



Therefore, in last paragraph, if balls of given weight separate J , balls of 



I*Q 1*22 



* their weight will separate to _ , therefore if balls of given weight with 

 c. p. i. 17 



