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29
KINETIC ENERGY OF ELECTRICITY IN MOTION [1]
The experiments gave the following results:-
Extra-Current.
No.
Primary
Current.
Reduced to Strength 100.
Branches
Opposed.
Branches
Branches Like.
Branches Like.
Opposec.
12345 COL
11.3
0.0275
0.1225
0.2434
1.084
17.2
0.0492
0.1940
0.2860
1.127
18.8
0.0478
0.2082
0.2542
1.107
20.9
0.0582
0.2430
0.2784
1.162
24.1
0.0628
0.2775
0.2606
1.152
27.7
0.0700
0-3235
0.2527
1.167
7
33.3
0.0857
0.3792
0.2537
1.138
8
37.2
0.0957
0.4015
0.2572
1.080
9
47.7
0.1057
0.5243
0.2216
1.099
10
57.8
0.1330
0-2301
11
66.2
0.1478
0.7357
0.2234
1.112
12
72.7
0.1555
0.2139
13
88.7
0.2135
0.2135
14
108.6
0.2432
0.2240
15
128.7
0.2945
1.1425
0.2158
1.051
16
141.3
0.3005
1.1825
0.2128
1.049
17
172.6
0.3872
0.2276
18
192.1
0.4105
0.2138
We get the mean value of the extra-current from branches
traversed in like directions and with strength 100 to be
1-111, with a mean error of 0.038. From this and the cal-
culated value of the ratio we get for the extra-current from
branches oppositely traversed the value 0.2203.
If we
compare this with the observed values we see that the
observed values for very weak currents are very much larger;
and the mean of all the observations, viz. 0.2379, differs
considerably from the calculated value. At the same time we
easily see that this difference in no wise justifies us in drawing
any inference as to mass; for it only occurs in the case of
those observations which were already uncertain because of
the smallness of the effects, and which agree only badly
amongst themselves. If we use only the better part of the
experiments from No. 8 onwards we get for the extra-current
from oppositely traversed branches the mean value 0.2197,
with a mean error 0·0060, and for the ratio of the two extra-
currents the value 5·054, a value which differs from 5.037,
the calculated one, by a quantity much less than the un-
avoidable errors of experiment. The deviation of the values
SCIENCE ENGINEERING L-