48 DR- W. A. BONE AND MR. R. V. WHEELER ON THE COMBINATION OF 
made under precisely the same conditions as regards temperature and rate of 
circulation as those just described. 
In Experiment XI., an original mixture corresponding very nearly to 3H 2 -f-0 2 was 
employed. The rate of combination was again proportional to the partial pressure of 
the hydrogen ; the values “ kj j ,” it will be observed, are almost identical with those 
obtained in the corresponding Experiment IX. 
In Experiment XII., the rate for “normal” electrolytic gas was determined after 
hydrogen had been continuously circulated over the gauze at 250° for 5 days, and had 
then been withdrawn as rapidly as possible from the apparatus. 
Experiment XIII. shows the rate for “ normal ” gas after the gauze had been 
completely “dehydrogenised" by circulating oxygen over it at 250° for 16 hours. 
The great difference between the rates observed in these two experiments is a further 
striking proof of the stimulating influence of hydrogen. Finally, in Experiment XIV., a 
mixture H 2 + 20 2 was employed after the gauze had been completely “dehydrogenised” 
by circulating oxygen over it for 36 hours at 250°. 
Experiment XI. 
December 14, 1904. 
Original mixture = 3H 2 + 0 2 nearly. T = 250°. Rate of 
circulation = 1 in 45 minutes. 
Experiment XII. 
December 19, 1904. 
Normal electrolytic gas over “ hy- 
drogenised” gauze. T = 250°. 
Rate of circulation = 1 in 45 
minutes. 
t. 
P H, 
p o. 
Z Ho. 
l O- 2 . 
t. 
P. 
h. 
hours. 
0 
1 
2 
3 
4 
5 
6 
ulilliais. 
305-7 
258-4 
218-3 
184-9 
155-5 
134-3 
115-9 
millims. 
100-6 
77-0 
56-9 
40-2 
25-5 
14-9 
5-7 
0-0730 
0-0731 
0-0728 
0-0734 
0-0710 
0-0702 
0 1160 
0-1237 
0-1328 
0-1490 
0-1659 
0-2078 
hours. 
0 
1 
4 
1 
2 
11 
1 2 
O 
21 
3 
. millims. 
406-9 
325-1 
275-5 
161-0 
137-4 
119-8 
101-8 
0-3900 
0-3388 
0-2685 
0-2357 
0-2124 
0-2006 
