478 
SIR B. C. BRODIE ON THE ACTION OF ELECTRICITY ON GASES. 
V. 
Yj. 
V-Vj. 
282*33 
282-09 
+ 0-24 
282-00 
282-14 
— 0-14 
282-13 
282-12 
+ 0-01 
The differences in the last column are hardly appreciable by the method employed, 
and we may conclude that any error in the following experiments arising from the 
oxidation of oil of turpentine by oxygen in its ordinary condition must be very small. 
In the first two experiments given in the following Table the gas was rendered moist 
before its passage through the oil of turpentine ; in the other experiments the gas was, as 
usual, dry. 
Experiments with Oil of Turpentine. 
Temperature. 
T. 
V. 
V-V r 
►3 1 
< 
ll°c. 
14-29 
281-27 
251-24 
30-03 
2-09 
11° 
14-29 
281-16 
254-16 
27-00 
1*88 
0° 
13-93 
280-85 
250-60 
30-25 
2-17 
0° 
13-93 
280-55 
252-57 
27-98 
2-01 
10° 
1 4*22 
280-14 
251-04 
29-10 
2-04 
10° 
14-22 
279-74 
253-39 
26-35 
1-85 
0° 
9-16 
282-45 
263-52 
18-93 
2-06 
0° 
9-0 
282-35 
262-95 
19-40 
2-11 
Mean 2-02 
In the following Table the differences from the mean and the squares of the differ- 
ences are calculated. 
v-v, 
Differences from 
the mean. 
Squares of 
the differences. 
x • 
2-09 
+ 0-07 
•0049 
1-88 
-0-14 
•0196 
2-17 
+ 0-15 
•0225 
2-01 
-0-01 
•0001 
2-04 
+ 0-02 
•0004 
1-85 
-0-17 
•0289 
2-06 
+ 0-04 
•0016 
2-11 
+ 0-09 
•0081 
Mean =2-02 cub. centirns. 
.. 
Sum =-0861 
The number of these experiments is eight. 
The probable error of the result =06745 a / 0M ' 1 - 
1 V « x 7 
= 003 cub. centim. ; 
and also 
the probable error of a single experiment = v /8x the probable error of the result 
=\/ 8 X 0-03 
= 0-08 cub. centim. 
