AT THE MOMENT OF CHEMICAL CHANGE. 
793 
have here a ratio 5 : 3, which is a greater loss than any in the other series of experi- 
ments. It is worthy of remark, that the loss per cent, on the peroxide is nearly the 
same in the two, which might lead us to think that this loss stood in some fixed ratio 
to the baryta of the substance, with the whole of which the oxygen of the peroxide 
may be considered to be in combination. This however is doubtless but a coinci- 
dence, as the experiments with chloride of silver, made with different preparations of 
the peroxide, where similar differences exist, do not show this relation. 
Experiments with the Oxide of Silver at the temperature of the air. 
The following experiments were made with the peroxide P (containing 8‘34 per 
cent, of oxygen) and oxide of silver at the temperature of the air. 
Table VII. — A. 
Peroxide of 
Oxide of silver. 
Chloride of silver 
Equivalent of 
barium P. 
found. 
oxygen. 
1. 
2*999 grms. 
0*824 grms. 
0*528 grms. 
0*2293 grms. 
2. 
3*004 
1*604 
0*9135 
0*05075 
3. 
3*017 
3*123 
1*3915 
0*0773 
4. 
3*022 
3*994 
1*6815 
0*0934 
5. 
3*039 
6*313 
1*990 
0*1105 
6. 
3*04 
7*788 
2*057 
0*1142 
7. 
3*029 
9*400 
2*041 
0*1133 
8. 
2*9417 
2*964 
2*2055 
0*1225 
9. 
3*059 
15*720 
2*3785 
0*132 
10. 
15*925 
26*522 
13*677 
0*759 
11. 
3*478 
9*405 
2*965 
0*1647 
12. 
3*021 
7*6195 
3*222 
0*1796 
Table VII.- 
-B. 
Oxygen in the 
Oxygen of the 
peroxide of 
oxide of silver 
Ratio, a : 
Calculated ratio. 
barium P = a. 
reduced ='\^. 
1. 
0*97 
2. 
1*68 
3. 
2*56 
7:2 
2*38 
4. 
3*10 
5:2 
3*33 
5. 
6. 
8*34 
3*63 
3*75 
9:4 
3*70 
7. 
3*74 
00 
4*16 
4*31 
2:1 
4*17 
10. 
11. 
4*76 
4*70 
7:4 
4*76 
12. 
5*94 
7:5 
5*95 
5 I 
MDCCCL. 
