AT THE MOMENT OF CHEMICAL CHANGE. 
785 
In the second Table, B, which follows, the oxygen equivalent to the reduced silver 
is compared with the oxygen in the peroxide; the peroxide being taken as 100, and 
the oxygen therefore as 8‘34. In the third Table, the oxygen in the peroxide is taken 
as the unit. The third and fourth columns in both cases contain the assumed and 
calculated ratio of the oxygen lost by the peroxide to that equivalent to the re- 
duced silver. I have assumed as this ratio the simplest ratio which agrees with the 
experiments, as a convenient and sufficiently accurate expression of the loss. 
Table I. — B. 
Table I. — C*. 
Oxygen in the 
peroxide of 
barium = a. 
Oxygen equivalent 
to the chloride 
of silver 
reduced = 4 ’- 
Ratio, a : 
Calculated ratio. 
1. 
6-11 
2. 
8-63 
3. 
12-11 
4. 
17-62 
5. 
22-54 
6. 
23-26 
9 : 2 
22-22 
7. 
100 
26-13 
8. 
24-46 
4 ; 1 
25-0 
9. 
26-25 
10. 
29-01 
11. 
29-61 
7 : 2 
28-57 
12. 
29-01 
13. 
32-73 
3 : 1 
33-33 
* In these Tables the experiments are arranged in all cases according to the nature of the actions, and not 
with reference to the quantities taken of the decomposed bodies. But for the sake of a ready general compa- 
MDCCCL. 5 H 
