Trials of charges on disks 2 1 7 



Tried with heavy corks. 



L - 2 separated pos. 

 S - 5f as much neg. 



If these experiments could be depended on as perfectly exact the coated 

 plate should contain T T g th part more electricity in proportion when electrified 

 with heavy corks than with light, but this difference is much too small to be 

 depended on. 



452] Comparison of two tin circles* 9-3 inches diameter with one of 18-5, 

 the tin plates supported on waxed glass and touched in the same manner as 

 wires, the trial plates supported on silk strings. 



The two circles at 36 in. distance. 



Side of square equivalent to trial plate. 



S i sep. very little neg. 

 S 2 did not 



L i sep. very little 



L - doubtful 



11-26 



I5-03 



Large circle touched by middle of touching wire. 



L 2 sep. very little pos. 

 S - i sep. very little neg. 



15-57 

 11-83 



Do. circle touched by extremity of touching wire. 



S 3^ very little neg. 

 L - 4 very little pos. 



12-62 

 16-64 



Small plates at 36 inches distance tried again, 

 sep. very little with L - i, which is the same as before. 



Small plates at 24 inches. 



S 7 very little pos. equivalent to 14-26. 

 Do. at 18 inches S - 5^ very little pos i3'55- 



453] A brass wiref, 72 inches long and -19 thick, was then tried, touched 

 by middle of touching wire. 



L - 2 sep. pos. 15-57 



S - 2| very little neg. 12-07 



454] From these experiments it should seem as if electricity] in 



Large circle touched at extremity 



at middle 



Two small circles at 36 inches 



do. at 24 



do. at 18 



were 

 as 



14-63 

 13-55 

 I3-I5 

 12-26 



"55 



If the two circles were placed at the same distance from each other in the 



[Art. 273 and Notes n and 21.] 



f [Art. 279.] 



