VOLUMETEIC EELATIONS OF OZONE. 
123 
evidently, as a sufficient approximation, 
Is 
S;V 15-8 S 
V “ 1-4367Cj9 ‘ 
(l+a076O 
If we suppose ozone to be allotropic oxygen, with a relative density e : 1, then of 
S V 
oxygen contracts to on being changed into ozone. Hence, on this hypothesis, 
SV— e-l‘ 
In order to verify this method, two similar vessels were filled with pure oxygen, one 
containing a capsule filled with a neutral solution of iodide of potassium, the other a 
capsule filled with an acidulated solution of the same salt, and of precisely the same 
strength. The neutral solution was also introduced into the siphon tubes of both 
vessels. After breaking the capsules, the levels were read, and the vessels set aside for 
some days ; at the end of which time it was found that a portion of oxygen gas had 
been absorbed in the primary vessel which contained the acid solution, while no change 
had occurred in the other. The levels were now read again, and the solution in the 
primary vessel analysed. 
The weight of the oxygen absorbed, as calculated by the foregoing formulae from the 
volumetric change, was 0-0002188 grm., while its weight deduced from the analysis was 
0-0002I8I grm. The close agreement between these numbers shows that the method 
is susceptible of considerable accuracy. 
The following Table contains the results of six experiments made in the manner above 
described. The primary and auxiliary vessels were carefully constructed of similar dimen- 
sions, and were found, on trial, to work accurately together, so that formula (3.) was di- 
rectly applicable. 
I. 
II. 
III. 
IV. 
V. 
VI. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
2.:, 
31-5 
- 3-0 
-18-5 
-48-5 
51-0 
39-0 
31-0 
18-0 
- 2-25 
- 6-5 
- 9-75 
- 8-25 
2x. 
4-0 
38-5 
- 0-5 
16-5 
72-5 
65-0 
2{x-\-lx). 
-78-0 
- 2-75 
-55-25 
- 5-0 
-39-0 
-27-5 
C. 
0-0338 
0-0306 
0-0288 
0-0279 
0-0269 
0-0346 
5. 
9-1 
5-4 
5-7 
5-1 
4-5 
4-5 
grm. 
grm. 
gnn. 
gnn. 
grm. 
grm. 
I. 
0-0268 
0-0684 
0-0442 
0-0674 
0-0446 
0-0621 
s. 
22-6 
47-95 
30-85 
49-5 
36-8 
44-43 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
n. 
777-0 
772-5 
763-0 
751-0 
747-2 
751-0 
t. 
ir -0 c. 
13°-45 C. 
9°-l C. 
9°-8 C. 
14"-0 C. 
14°-7C. 
1 
H‘ 
0-000025 
0-000024 
0-000025 
0-000026 
0-000027 
0-000036 
8,V 
8V 
0-932 
0-938 
0-947 
0-927 
0-952 
0-933 
