128 
^lESSRS .T. HOPKraSON AND E. WILSON ON THE 
Table V. (continued).—iOtli November, 18.9G. 
Window-Glass Flask. Solder used instead of Acid. 
Time of contact. 
n in ohms. 
Resistance 
of flask c in 
Temperature of 
flask °C. 
1 
c 
10® ohms. 
in 10“® ohms~h i 
f-00002 
•7 
•0001.56 
about 350 
6410 
J 
•00099 
1-.5 
•000334 
„ 350 
3000 
S 
•0028 
1-5 
•000.334 
„ 3.50 
3000 
[•on 
1-5 
•000334 
„ .3.50 
3000 
•00002 
18 
•00446 
285 
224-0 
•00002 
130 
•0290 
229 
34-5 
•00002 
200 
•0446 
219 
22-4 
r -00002 
270 
•0602 
•203 
16-6 
J 
•00099 
330 
•0736 
202 
13-6 
> 
•006 
370 
•082.5 
200 
12-1 
[•014 
370 
•0825 
200 
121 
Summary of 
iv'.snlt.s with acid. 
•00002 
1000 
•223 
160 
4-48 
•00002 
1800 
•400 
143 
2o 
•00002 
4700 
1 05 
112 
•71 
•00002 
4100 
1-86 
80 
•43 
•00002 
6080 
2-76 
55 
•0 
•00002 
5600 
3-99 
15 
•28 
Let Kj, Kg, and F be discharged and let the potential difference Y be applied to 
the bridge for time t. Let c be the ohmic resistance of the flask at the end of time t. 
Let K be its instantaneous capacity which is found by resonance at frequency 
2 X 10'^. Let V be the potential across a. Then 
V 
a 
Y -V 
c 
+ (V - vy 
V 
Ya 
a + c 
Cl f C a+c I 
We know a, K, and t, and measure-il + — e“HTiA- 
’ ’ a + c \ ' a .1 
Now c is large compared to a, hence ~, therefore e 
equal A. Then we have 
«+c 
a -f- Ac Ivo 
o + c Kj -f Kg 
is known; let it 
We have reduced a consistent with fair sensibility until the correction due to 
