ELECTRIC DISCHARGE WITH THE CHLORIDE OP SILVER BATTERY. 
167 
Current — 
1st Observation. 
Zero 5 right = 0 
Full potential (open circuit) 194 
„ (closed ,, ) 193 
Potential after 800,000 ohms 166 
„ at ring 1 138 
„ 17 5 
2nd Observation. 
5 ri 2 ’ht= 0 
=189 
192 
QO 
•^r 
= 188 
191 
„ =186 
= 161 
167 
„ =162 
= 133 
136 
„ =131 
= 0 
5 
„ = 0 
Mean Differences. 
1 
25-5 
132 
III. The induction plate was lowered from 2 inches to l\ inches. 
current + was not observed for want of time.) 
Current — . 
(The 
Ring 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 
Readings 276 217 200 187 174 159 144 130 116 104 90 76 62 48 35 22 0 
Differences 59 17 13 13 15 15 14 14 12 14 14 14 14 13 13 22 
The observation III. illustrates that which has already been said concerning the fall 
of potential within the tube. 
It will be noticed in case I. that there was a greater difference between the scale 
readings with positive and with negative currents than that which would result 
from the mere fact of the different poles being to earth. This was caused by 
torsion in the suspension arising from an imperfection in the arrangement of the 
instrument not at that time discovered. This does not, however, sensibly affect the 
following deductions : — 
In case I. we have for the currents in Webers— 
and for the difference of potential in volts (Y) between the two ends of the tube — 
(C+) Y=i^X 2400X1-03 = 1730, and (C-) Y=HlX 2400 X 1‘03= 1618. 
These differences of potential would be reproduced if for the tube were substituted 
metallic resistances in ohms (R) — 
(C+) R=JJf X 1,000,000 = 2,383,000, and (C-) R=^X 1,000,000=1,954,000. 
In case II. — 
_fx 2400X1-03 
L ' +— 800,000 
= 0-0003674, and C — = 
2 55 
18 8 
X 2400 X 1"03 
800,000 
= 0-0004190. 
(C+)Y = ^x 2400X1-03=1756, and (C — )V=iff X2400 X T03 = 1736. 
(C-f)R= i I 1 crirX 800,000=4,780,000, and (C-)R=H4;X 800,000 = 4,142,000. 
