134 Professors Ayrton and Perry on the Measurement 
Time after 
putting on 
battery. 
Galvanome- 
Electrometer-deflect i on . 
Temperature. 
Figure 1. 
Figure 2. 
l m 
2 
3 
99 
96 
94 
10 
10 
10 
1 59°-5 F. 
Plates and wires thoroughly discharged. 
2 
3 
99 
98 
90 
14 
14 
14 
1 61° F. 
Time after putting 
on battery. 
Eesistance as 
determined by 
the galvanometer. 
Eesistance as 
determined by 
the electrometer. 
2 
3 
37000 
38000 
39000 
7100 
7100 
7100 
The annexed Table gives the results of a lon< 
periments: — 
series of ex- 
Total elec- 
tromotive 
force, in 
Tempera- 
ture. 
Resistance 
as deter- 
mined by 
galvano- 
Ratio of 
resistance 
at the end 
of second 
minute to 
the resist- 
Ratio of 
resistance 
at the end 
of third 
minute to 
the resist- 
Resistance 
as deter- 
mined by 
electro- 
Ratio of 
resistance 
determined 
by galvano- 
meter to 
resistance 
Date. 
ance at the 
ance at the 
meter. 
mined by 
electro- 
meter. 
minute. 
end of the 
first. 
end of the 
first. 
093 
58 °F. 
939U0 
1-27 
1-4 
15000 
6-26 
23rd Jan. 
GO 
133000 
112 
137 
15000 
8-87 
23rd „ 
A 0-93 
100 
56000 
1-16 
1-27 
8000 
700 
24th „ 
1-86 
63 
53000 
110 
114 
10670 
5 
•24th „ 
1-86 
62 
51500 
112 
1-18 
10300 
5 
24th „ 
B 1-86 
102 
32000 
1-17 
1-27 
9670 
331 
24th „ 
4-08 
59-5 
37000 
103 
105 
7100 
5-21 
25th „ 
4-OS 
102 
19800 
1-01 
106 
3270 
606 
28th „ 
617 
60 
21000 
10 
1-0 
4450 
4-72 
28th „ 
C 617 
106 
12000 
108 
108 
2700 
4-44 
31st „ 
16-45 
62 
12700 
101 
1-99 
3170 
4-01 
31st „ 
D 1645 
107 
7700 
1-04 
104 
1953 
3-94 
31st „ 
Only one number is given for the resistance as determined 
by the electrometer in each case, because it was found not to 
vary much during the time of electrification ; whereas the 
