was equal to. 
als Ale 
( 110 ) 
. 
0.0815 
0.107 
According to HERMANN's theory it must be possible to calculate 
from these data the internal resistance of the capillary electrometer. 
Let the internal ohmic resistance of the capillary electrometer be 
denoted by w;, the resistance intentionally inserted in the circuit 
wy, then 
w= Wi + Wy 
h 
C. —— 9 and C mes 
Wi 
hence we must have 
wi (HERMANN) = 
h 
wi + Wy 3 
Wy 
1 . 
Cz € Ds =) 
TE 
Substituting the values of C,, C; and w, we obtain 
wi = 0,320 Megohm. 
Now wi; may be calculated also from the dimensions of the ca- 
pillary, in which case a knowledge of the dimensions of the sul- 
phuric acid thread is principally necessary. Calculating the resistance 
from the dimensions, w; was found 0,029 megohm; hence more then 
11 times smaller than the amount required by HERMANN’s theory. 
Here follows a table with the correspondent calculations for four 
capillary electrometers. 
PsA BEN 
Number 
of the 
capillary. 
103 
bob & ® 
2 
vo 
wi as calculated 
according to 
wi as calculated 
from the dimensions 
HERMANN’S theory. | of the capillary. 
0,820 Megohm 
1,545 7 
1,411 7 
0,665 r 
0,029 Megohm 
0,124 7 
0,101 W 
0,026 r 
