784 
MR. BRODIE ON THE CONDITION OF CERTAIN ELEMENTS 
(1.) 2'6355 grms. of the peroxide gave with platinum and acetic acid, a total loss of 
0*227 grm. of oxygen. 
( 2 .) 2*9474 grms. of the same gave with platinum and acetic acid, a total loss of 
0*2.57 grm. of oxygen. 
(3.) 2*847 grms. of the same gave with platinum and hydrochloric acid, a total loss 
of 0*241 grm. of oxygen. 
(4.) 2*9815 grms. of the same gave, in a similar experiment, a total loss of 0*254 
grm. of oxygen. 
These determinations correspond to a loss of oxygen per cent, of — 
I. II. III. IV. Mean. 
8*65 8*71 8*46 8*51 8*58 
III. Peroxide O. 
III. — (1.) 2*4875 grms. of a peroxide (O) gave with platinum and hydrochloric acid, 
a loss of 0*191 grm. of oxygen. 
(2.) 2*515 grms. of the same, in a similar experiment, lost 0*191 grm. of oxygen. 
(3.) 2*7296 grms. of the same, in a similar experiment, lost 0*204 grm. of oxygen. 
These determinations correspond to a loss of oxygen per cent, of — 
I. II. III. Mean. 
7*67 7-59 7-47 7-57 
Experiments with Chloride of Silver at 100° C. 
The following experiments were made with the peroxide P and chloride of silver at 
100° C. The chloride of silver was in the finely-divided state in which it is produced 
by precipitating nitrate of silver with chloride of sodium. The precipitate with 
hydrochloric acid cannot so readily be mixed with the peroxide. The chloride of silver 
was dried either at 1 00° or at a gentle heat over a lamp ; it was, when dried, in the state 
of a fine powder. 
The following Table contains the details of the experiments : — 
Table I. — A. 
Peroxide of barium P. 
Chloride of silver 
taken. 
Chloride of silver 
obtained. 
Equivalent of oxygen. 
grms. 
grms. 
grms. 
grms. 
1 . 
3-0115 
0-527 
0-280 
0-0155 
2. 
3-014 
1-003 
0-3945 
0-0219 
3. 
3-0865 
1-404 
0-5633 
0-0312 
4. 
3-0455 
2-057 
0-8085 
0-0449 
5. 
3-0036 
4-011 
1-019 
0-0566 
6. 
3-0206 
5-963 
1-0573 
0-0587 
7 . 
3-0295 
7-983 
1-1815 
0-0656 
8. 
2-958 
9*235 
1-087 
0-0605 
9 . 
2-967 
11-139 
1-170 
0-0652 
10. 
3-0465 
11-064 
1-3105 
0-0728 
11. 
3-0375 
15-960 
1-3515 
0-0759 
12 . 
3 -O 695 
19*920 
1-3425 
0-0745 
13. 
3-0125 
8-059 
1-4795 
0-0822 
