(114 ) 
1 Ee 
We see, that the increase of the value of G Varies directly as the 
increase of the resistance. Hence it follows immediately that, 
1 
ol came? | =} bw 5 
a and 5 being constants, determined by the properties of the instru- 
ment independent upon the internai ohmic resistance. 
w represents the resistance in the circuit in megohms. 
Hence our formula (1) 
dy 
ap tr ee 
now becomes 
dy 1 6 (3) 
EAT plee) AAE EEE eee 
5 1 1 
For w= 0, ie -- =—, hence the constant k is equal to —. 
a + bw a a 
1 
The constant b is the increase of ra when the resistance in the 
circuit is increased with 1 megohm. 
In the subjoined table the values of a and b are given for four 
capillary electrometers. 
TAB LE dE 
Number of 
a b 
the capillary. 
G. 108 0,0741 0,225 
B> 101 0,1599 0,1124 
B. 102 0,2181 0,166 
B. 103 0,3429 0,5365 
We may obtain a better insight into the action of the capillary 
electrometer in considering in which manner and to what amount 
the different forms of energy are transformed with a given displa- 
cement of the meniscus. For this purpose the following representa- 
tion may prove of use in this connection. 
