60 
DR. W. A. BONE AND MR. R. V. WHEELER ON THE COMBINATION OF 
Experiment I. 
May 7, 1905. 
Normal electrolytic gas. 
T = 160°. Rate of circu¬ 
lation = 1 in 35 minutes. 
Experiment II. 
May 8, 1905. 
Original mixture = H 2 + 20 2 . T = 160°. 
Rate of circulation = 1 in 35 minutes. 
Experiment III. 
May 11, 1905. 
Normal electrolytic gas 
after 0 2 . T = 160°. 
Rate of circulation = 1 
in 35 minutes. 
t. 
1 
P. 
t. 
P H„ 
P 0, ! 
1 ' 0 2 . 
t. P. 
k. 
hours. 
millims. 
hours. 
millims. 
millims. 
hours. millims. 
0 
468-5 
_ 
0 
150-7 
301-4 
— 
■ - 
0 453•1 
— 
1 
415-0 
0-1056 
1 
120-7 
268-4 
0-0965 
0-0222 
! 430-6 
0-1070 
l 2 
373-0 
0-0991 
2 
100-1 
276-1 
0-0888 
0-0190 
1 359-3 
0-1007 
2 
289 • 5 
0-1047 
3 
80-9 
266-4 
0-0901 
0-0179 
2 286-3 
0-0997 
4 
196-1 
0-0951 
4 
64-1 
257-8 
0-0928 
0-0170 
3 227-9 
0-0995 
5 
155-2 
0-0960 
5 
51-4 
251-3 
0-0934 
0-0158 
4 181-7 
0-0992 
The rate of reduction of the surface by hydrogen at 160° was next determined, and 
in order to make the experimental conditions as nearly as possible the same as those 
in I. and III., a mixture of hydrogen and nitrogen corresponding to 2H 2 + N 2 was 
employed. The results showed, however, that only 8 per cent, of the original hydrogen 
disappeared during the first hour as compared with over 20 per cent, in the two 
experiments with electrolytic gas. 
Experiment IY. 
May 12, 1905. 
Reduction of surface by 2H 2 + N 2 at 160°. 
t . 
0 
1 
1 
H 
2 Lours. 
P. 
460-3 
444-3 
436-3 
431-3 
427 • 8 millims. 
p h 2 - • • • 
299-3 
283-5 
275-5 
270-5 
267-0 „ 
. 
• 
hh 
_ HH 
— 
0-0464 
0-0354 
0-0286 
0-0243 
Finally, after the surface had been reduced by circulating several successive full 
charges of hydrogen over it (the temperature being raised to 300° in order to 
accelerate the process), the rate of re-oxidation of the reduced material with oxygen 
at 160° was determined as follows :—- 
