Whether capacity is independent of charge 



Tried with the usual corks. 



With the electricity neg. L - z\ sep. a little. 



pos. L - 3f do. 



neg. L 2j do. 

 According to these experiments the plate should seem to contain 



223 



4 x 



4 _ 7 



3 - TFT 



1 th 



r*orf 



P art 



more electricity in proportion when electrified by heavy corks than light, and 

 about V h more when electrified pos. than neg. 



464] A plate -345 inches thick was pressed out of exper. rosin and coated 

 with circle 3-41 inches diameter, therefore computed power = 337. This was 

 compared with double plate B by help of the sliding coated plate mentioned 

 in [Art. 442]. 



Breadth of coating on sliding plate 



Rosin 29 sep. a little neg. 



22 sep. a little pos. 



B 20 sep. a little pos. 



26^ sep. a little neg. 



Therefore the plate contains 18-3 x -^y = 20 inches of electricity*. 



465] Side of square equivalent to trial plate. 

 Small plate o = 1072 



drawn out to i = 11-26 



2 = 11-80 



-54 



3 = 12-35 



4 = 12-83 



5 = I3-3I 



6 = 13-78 \ -48 



7 = 14-26 



8 = 14-74 

 Large plate o = 14-49 



drawn out to i = 15-03 



2 = 15-57 \ '54 



3 = 16-10 



4 = 16-64 ' 



5 = i7- J 2 



6 = 17-60 



7 = 18-08 



8 = 18-56 \ -48 



9 = 19-04 

 ro = 19-52 

 ii = 20-00 



* [This would make the specific capacity of rosin 20 x 5-1/33-7 = 3. The 

 numbers in Art. 462 make it 3-3.] 



