47G 
SIR B. C. BRODIE ON THE ACTION OF ELECTRICITY ON GASES. 
Experiments with slightly alkaline Hyposulphite of Soda. 
Temperature. 
Strength of 
the solution. 
T. 
Y. 
Yj. 
Y-H 
Y— Yj 
T ' 
o°c. 
•05 
1-60 
87-34 
83-96 
3-38 
2-09 
16° 
•50 
13-41 
272-31 
243-93 
28-38 
2-10 
0° 
•94 
12-95 
274-11 
250-49 
23-62 
1-82 
0° 
12-95 
273-89 
249-31 
24-58 
1-90 
16° 
•85 
13-81 
272-50 
243-69 
28-81 
2-13 
0° 
1-75 
9-79 
274*75 
254-44 
20-31 
2-07 
0° 
9-79 
274-66 
254-12 
20-54 
2-10 
14°-5 
10-52 
274-92 
255-89 
20-03 
1-90 
15° 
13-81 
273-63 
245-18 
28-45 
2-06 
15° 
13-81 
272-88 
244-95 
27-93 
2-02 
Mean 2-02 
The following Table contains the differences of the value of — in the case of the 
several experiments from the mean value of that ratio and the squares of the differences. 
Y— Yj 
T 
Differences from 
the mean. 
Squares of 
the differences. 
2-09 
+ •07 
•0049 
2-10 
+ •08 
•0064 
1-82 
.0 
•04 
1-90 
-•12 
•0144 
2-13 
+ •11 
•0121 
2-07 
”f- *05 
•0025 
2-10 
+ •08 
•0064 
1-90 
-•12 
•0144 
2-06 
+ •04 
•0016 
2-02 
•0 
•0 
Mean =2*02 
Sum =-1027 
The number of these experiments is ten. 
The probable error of the result = 0'6745 
= 0 , 023 cub. centim. ; 
and also 
the probable error of a single experiment = -y/10 X the probable error of the result 
^x/IOxO-023 
= 0-07 cub. centim. 
We may, therefore, from these experiments regard it as an equal chance that the true 
Y — V 
value of the ratio — 1 is included between the limits 2-00 and 2 - 04. 
From the value of the probable error of a single experiment, 0*07, half the above 
observations would theoretically he included within the limits 1*95 and 2 '09 ; four of 
the ten observations are actually within these limits, and six external to them. 
