OAPACITY AND RESIDUAL CHARGE OP DIELECTRICS. 
129 
instantaneous capacity is so small as to be almost negligible, that is, until is 
sensibly equal to — 
« + c 
Ko + Ki 
How far we have been able to carry this can be seen by an inspection of Table V. 
It is only for the shortest time of contact that the correction for e becomes at all 
sensible. 
Fi". 7. 
o 
All temperatures from 15° to 145° were obtained by heating the flask as mounted 
in fig, 1 ; for 200° to about 350° acid was taken away and a solder, melting at about 
180° C., substituted. Since the solder only half filled the flask the conductivity 
should be about doubled for 200° to 350° when comparing with the lower temperatures. 
Since — is the conductivity of the jar at time let curves of conductivities be 
s 
MDCCCXCVII.—A. 
