788 
MR. BRODIE ON THE CONDITION OF CERTAIN ELEMENTS 
merit 1 only 13*2 parts out of 100 of the chloride are reduced. And here the ratio 
9 : 2 occupies the place of the ratio 4 : 1 or 8 : 2 on the other series. But the limiting 
ratio of 7 *• 2 is in both series the same, and on the whole a certain increase of loss, 
although not a gradual increase, is to be observed with the increase of the chloride 
taken. These experiments confirm the fact, that under similar circumstances the 
different preparations of the peroxide have a different reducing power. 
Experiments with Chloride of Silver at the temperature of the air. 
The next experiments were made also with the chloride of silver, but at a lower tem- 
perature, the temperature of the air. I had already found how very much at this low 
temperature the temperature might be varied without alteration of the action, and in 
this case the experiments are arranged without any special reference to the variation 
of the temperature. The peroxide in the first series was the same as that taken in the 
last experiments, namely, the peroxide Q containing 8*58 per cent, of oxygen. 
Table HI.— A. 
Peroxide of 
Chloride of 
Chloride of 
Equivalent of 
barium Q. 
silver taken. 
silver obtained. 
oxygen. 
1. 
3*034 grms. 
4*0125 grms. 
1*366 grms. 
0*076 grms. 
2. 
2*9942 
4*988 
1*480 
0*0825 
.3. 
3*0275 
6*1315 
1*545 
0*08613 
4. 
2*994 
8*0905 
1*9415 
0*10823 
5. 
2*9742 
10*016 
2*043 
0*1138 
6. 
2*9532 
14*916 
2*019 
0*1125 
7. 
3*014 
9*9915 
2*336 
0*1302 
8. 
2*9915 
12*9075 
2*3125 
0*1289 
9. 
2*0132 
14*916 
1*5485 
0*0863 
Table III.- 
-B. 
Oxygen in the 
peroxide of 
barium Q=a. 
Oxygen equivalent 
to the chloride 
of silver 
reduced = i/-. 
Katio, a ■. 
Calculated ratio. 
1. 
2*50 
7:2 
2*48 
2. 
3. 
2*75 
2*84 
3: 1 
2*86 
4. 
8*58 
3*61 
7:3 
3*67 
5. 
6. 
3*82 
3*80 
9:4 
3*81 
7. 
4*31 
8. 
4*30 
2 : 1 
4*29 
9. 
4*28 
* 
