SIR B. C. BRODIE ON THE ACTION OF ELECTRICITY ON OASES. 
469 
Experiments with strongly alkaline Hyposulphite of Soda. 
I. 
V-V, 
T 
II. 
Differences from 
the mean. 
III. 
Squares of the 
differences. 
0-95 
— •08 
•0064 
0-74 
-•29 
•0841 
0-96 
-‘07 
•0049 
0-84 
-•19 
•0361 
0*87 
-•16 
•0256 
0-90 
-•13 
•0169 
1-20 
+ ‘17 
•0289 
1 *22 
+ ‘19 
•0361 
1-23 
+ •2 
•04 
0-96 
—07 
•0049 
1-1 3 
+ •1 
•01 
M3 
+ ■1 
•01 
0-98 
— *05 
•0025 
1-01 
— •02 
•0004 
0-95 
— •08 
•0064 
1-01 
— •02 
•0004 
1-33 
+ •3 
•09 
1-02 
— •01 
•0001 
Ml 
+ •08 
•0064 
M6 
+ •13 
•0169 
M6 
+ '13 
•0169 
0-76 
-•27 
•0729 
Mean= 103 cub. centim. 
Sunt = *51 68 
The number of these experiments is twenty-two. 
The probable error of the result =06745 
= 0022 cub. centim. ; 
and also 
the probable error of a single experiment =\/22 x the probable error of the result 
=>/22x0-22 
:=0T cub. centim. 
We may conclude, therefore, from these experiments that it is an equal chance that 
the true value of the ratio lies between the value 1*01 and T05 ; also, if we should 
proceed to make another experiment by the same method, it is an equal chance that the 
value of the same ratio in that experiment would lie between the limits ITS and 0‘93 ; 
and half the values of this ratio in the preceding twenty-two experiments should lie 
between the same limits. There actually are 1 1 values of 
V-Y, 
T 
in the preceding Table 
within these limits, and 11 of these values outside those limits. In this point, there- 
fore, the experiments are in entire accordance with theory. 
The theoretical value of the ratio - ~ Vl lies just outside the limits of probable 
3s2 
