[ 621: J 
from or from if 
EC’^^ is very fmall in refpeaof AC”-S EC* is a- 
fortiori very fmall in refpea: of AGV 
Co ROLL. III*. 
Suppofe now that the matter of the plate is denfer 
near the circumference than near the middle, and" 
that the denfity at and near the middle is to the mean 
denfity, or the denfity which it would everywhere be 
of if the matter was fpread uniformly, as <? to one>. 
the repulfion of the plate on EC will be lets than if: 
the matter was fpread uniformly, in a ratio ap- 
proaching much nearer to that of <5^ to one, than to 
that of equality.. 
C o R o L L. IVv 
' Let every thing be as in the I aft corollary, and let 
7T be taken to one, as the force with which the plate 
adually repels the column DC (DC”-^ being very- 
great in refped of AC"-') is to the force with 
whicht it would repel it, if the matter was fpread 
uniformly;: the repulfion of the plate on EC will 
be to its repulfion on DC, in a ratio between that of 
EC3— to ACs^x-tt, and that of EC3— « to 
AC 3-» x7r,. but will approach much nearer to the 
former ratio than to the latter,. 
Bemma-i 
