626 
MR. H. B. DIXON ON CONDITIONS OF CHEMICAL CHANGE 
Table III.—Experiments with Carbonic Oxide and Electrolytic Gas in a 
Wet Eudiometer. 
X 
Number. 
Dixon’s experiments. 
Bunsen’s experiments. 
Number. 
100 volumes of the combustible 
gases contain 
Ratio of 
carbonic acid to 
water formed 
100 volumes of the combustible 
gases coutain 
Ratio of 
carbonic acid to 
water formed 
CO 
Ho 
C0 3 
Hod 
CO 
Ho 
CO, 
HU 
i 
80-3 
19-7 
2-83 
79-9 
20-1 
2-04 
i 
2 
79-5 
20-5 
2 - 65 
3 
79-3 
20-7 
2-03 
4 
79-2 
20-8 
226 
5 
78-7 
21-3 
2-34 
6 
75-7 
243 
162 
7 
75-3 
24-7 
1-46 
74-2 
25-8 
•89 
2 
8 
736 
26-4 
1-40 
9 
71-4 
28-6 
1-07 
10 
70-2 
29-8 
1-08 
11 
69-2 
30-8 
1-00 
692 
30-8 
•95 
3 
12 
69- L 
30-9 
1-00 
13 
60-2 
39-8 
•62 
59-6 
40-4 
•51 
4 
14 
48'2 
51-8 
*44 
15 
46-8 
53-2 
•39 
16 
46'6 
53-4 
•39 
46-5 
53-5 
•34 
5 
17 
45-8 
54-2 
•39 
37-4 
62-6 
•29 
6 
18 
28-3 
71-7 
•22 
28-8 
71-2 
•24 
/ 
27-0 
73-0 
■20 
8 
These experiments gave no indication of any sudden change in the proportion of 
carbonic oxide and hydrogen burnt. They neither agreed well with Bunsen’s results, 
nor were they concordant one with another. In the first five experiments the pro¬ 
portion of carbonic oxide to hydrogen taken was nearly the same as in Bunsen’s first 
experiment, but the ratio of carbonic acid to steam formed varied from 2'8 to 2. In 
the 9th, 10th, 1 Lth, and 12th experiments the proportion of carbonic acid to hydro-- 
gen taken was nearly the same as in Bunsen’s 3rd experiment; the results were 
concordant and agreed with Bunsen’s. Between these two sets, according to 
Bunsen, the sudden change from 2:1 to 1:1 occurs. Experiments 6, 7, and 8, inter¬ 
mediate between these two sets, gave intermediate ratios for the carbonic acid and 
water formed. Experiment 13 did not agree with Bunsen’s 4th, nor Experiments 
15, 16, and 17 with Bunsen’s 5th. 
These discrepancies, greater than could be accounted for by any error of manipulation, 
led to a more minute examination of the conditions affecting' the chemical change. 
o o 
