SIE B. C. BRODJE ON THE ACTION OE ELECTRICITY ON GASES. 
95 
l. 
ii. 
III. 
IV. 
V. 
VI. 
VII. 
Experi- 
ment. 
Strength of the 
tin solution. 
T. , 
s. 
.s. 
t' 
V. 
Y*. 
V— Vj. 
E=I^, 
1 . 
4‘2 
3-22 
8-87 
2-75 
56-07 
49-94 
6-13 
1-9 
2. 
2 - 1 
3*22 
8-68 
2-69 
56-07 
50-25 
5-82 
1-8 
The density of the gas thus absorbed by the protochloride of tin may be calculated 
from these data. Putting A as this density, the density of oxygen being the unit of 
comparison, we have for the value of A, in the two experiments respectively, 
(!) A =lll= 1 - 45 > 
(2) A =H =1 ' 49; 
that is, once and a half the density of oxygen. It is to be observed that the value of A 
here given is quite independent of the “ titre ” of the gas and unaffected by any errois 
in its estimation. 
The volumes of gas operated upon in these experiments were altogether too small to 
bring out very sharp results, and the agreement between theory and experiment is 
perhaps as close as could be anticipated. I am, however, inclined to believe the some- 
what low value of the mean, 2*77, to be due to a real although slight diminution in the 
oxidation, owing to the dilution of the ozone with carbonic-acid gas. In the two fol- 
lowing experiments, in which the solution of the tin salt was excessively dilute, a much 
lower number for the comparative oxidation was obtained. 
I. 
II. 
III. 
Strength of the 
T. 
S. 
S 
tin solution. 
t’ 
•42 
3-24 
8-18 
2-51 
•21 
3-24 
798 
2-45 
The following experiments were made with an electrized gas obtained by passing a 
mixture of one volume of oxygen and four volumes of carbonic-acid gas through the 
induction-tube, S and T being the weight in grammes of the oxygen found by titration. 
I. 
II. 
III. 
Experiment. 
T. 
S. 
_S 
r T' 
1 . 
•0084 
0273 
3-25 
2. 
•0079 
0241 
3-05 
3. 
•0079 
0257 
3-26 
4. 
•0073 
0242 
3-29 
In experiment 3 the concentration of the solution of the tin salt was twice that of the 
solution employed in the two previous experiments. In experiment 4 that solution was 
