42 
DR. W. A. BONE AND MR. R, Y. WHEELER ON THE COMBINATION Of 
Experiment XXII. 
April 7, 1905. 
Normal electrolytic gas. T = 400°. Rate of circulation = 1 in 70 minutes. 
i 
t . 
P. 
1 
t. 
P. 
h. 
hours. 
millims. 
hours. 
millims. 
0 
560-2 
— 
7 
162-6 
0-0767 
1 
468 ■ 3 
0-0779 
9 
115-9 
0-0760 
2 
388 • 1 
0-0795 
11 
82-1 
0-0758 
3 
325 • 1 
0-0788 
12 
70-5 
0-0750 
5 
234-2 
0-0758 
23 
10-7 
0-0747 
6 
194-0 
0-0767 
In the next experiment (XXIII.), a mixture corresponding very nearly to 3H 2 + 0 2 
was employed. The surface was immediately stimulated, and the rate of charge was 
much more proportional to the partial pressure of the hydrogen than to that of the 
oxygen throughout the experiment. The results were as follows :— 
Experiment XXIII. 
3H 2 + 0 2 
April 8, 1905. 
T = 400°. Rate of circulation = 
1 in 75 minutes. 
t. 
P. 
P H„ 
" 
p o. 
l 'o. 
hours. 
millims. 
millims. 
millims. 
0 
394-8 
297-2 
97-6 
— 
— 
.1 
364-8 
277-2 
87-6 
0-0606 
0-0938 
1 
332 • 4 
255-6 
76-8 
0-0656 
0-1040 
l-h 
298-0 
232-6 
64-5 
0-0710 
0-115S 
2 
266-3 
211-4 
54-9 
0-0740 
0-1249 
91 
u o 
238-2 
192-6 
45-6 
0-0754 
0-1322 
n 
189-9 
160-4 
29-5 
0-0764 
0-1484 
4 
171-0 
147-8 
23-2 ’ 
0-0778 
0-1562 
4b 
147-6 
132-2 
15-4 
0-0782 
0-1782 
The residual hydrogen was then circulated over the foil at 400° for 22 hours, after 
which the apparatus was exhausted (1 hour), and a fresh charge of electrolytic gas 
admitted. The rate of combination observed (Experiment XXIV.) was extremely 
rapid, no less than 66'8 per cent, of the original gas disappearing within an hour as 
compared with only 16*5 per cent, in Experiment XXII., when the foil was in a 
condition of “normal” activity. The rapidly diminishing values of “ /y\” indicated a 
fading away of the stimulus as the experiment proceeded. In order to completely 
dehydr 
ogemse 
the foil, air was circulated over it at 400° for 22 hours. The 
