794 
MR. BRODIE ON THE CONDITION OF CERTAIN ELEMENTS 
Table VII.— C. 
Oxygen in the 
peroxide of 
barium P = a. 
Oxygen of the 
oxide of silver 
reduced = ■vf. 
Ratio, a : 
Calculated ratio. 
1. 
11-63 
2, 
20-14 
3. 
30-69 
7:2 
28-57 
4. 
37-17 
5:2 
40-0 
5. 
43-52 
6. 
7. 
100 
44-96 
44-84 
9:4 
44-44 
00 
49-88 
51-67 
2: 1 
50-00 
10. 
11. 
57-07 
56-35 
7:4 
57-1 
12. 
71-22 
7:5 
71-42 
When small quantities of the oxide of silver are taken, the loss is not very different 
from that at the higher temperature, as is also the case in the experiments with the 
chloride ; but after a certain point the actions diverge, and the total general result 
gives an entirely different range of action in the two series. In all cases, after a cer- 
tain point, the mass ceases to have a determinate influence on the action ; and here 
this influence would seem soon to be entirely lost, for after the first two or three ex- 
periments, no relation whatever can be traced between the relative masses of the sub- 
stances and the proportion of reduced silver. At the same time, even these experi- 
ments, which we may regard as accidental, arrange themselves in a certain order, 
and give on the whole higher numbers in the series of ratios than any yet obtained. 
This series may be extended yet further; thus two experiments with peroxide O, at 
the temperature of the air, gave — 
Table VlII.— A. 
Peroxide of 
barium 0. 
Oxide of silver. 
Chloride found. 
Equivalent of 
oxygen. 
1. 
2-926 grms. 
5-186 grms. 
2-8557 grms. 
0-1586 grm. 
2. 
3-06 
5-064 
3-0402 
0-1689 
Table VIII.— B. 
Oxygen in the 
peroxide of 
barium 0=a. 
Oxygen of the 
oxide of silver 
reduced = r?-. 
Ratio, a : 
Calculated ratio. 
1. 
2. 
7-57 
5-42 
5-51 
7:5 
5-40 
