Dr. Henry's Experiments on Ammonia. 441 
obtained is 31.34 -f- 88.66 == 120; and the proportion of the 
hydrogen by volume to that of the nitrogen, as 73.88 to 26.12. 
To avoid the tediousness of similar details, I shall state, in 
the form of a table, the results of a few experiments out of a 
number of others, all of which had, as nearly as could be ex- 
pected, the same tendency. The sixth experiment in the table 
is the one which has been just described. 
No. of 
Exp. 
Meas. of 
Ammon, 
decom- 
posed. 
Meas. of 
Oxygen 
saturated. 
Meas. of 
Hydrogen 
estimated. 
Meas. of 
Nitrogen 
obtained. 
Hence ioo Meas. 
of Ammonia. 
Permanent Gas 
contains in ioo 
Measures. 
' Take 
Oxygen. 
Give 
Gas. 
Hydr. 
) 
Nitr. 
1 
72 
47-5 
95 
37 
66 
18 3 
72 
28 
2 
95 
64 
128 
4b 
b7>3 
183.3 
73-5 
263 
3 
100 
72.2 
H4-4 
34 
72.2 
19b.3 
72.8 
28.2 
4 
74 
3 1.7 
103.4 
37 
69.8 
18 9 
73-6 
2 7 -4 
3 
49 
33 -7 
67.4 
2 5-3 
68.7 
180.2 
72.7 
27-3 
6 
63 
44-3 
88.6 
31-3 
7o-3 
193-3 
73-9 
26.1 
From an attentive examination of the foregoing table, it 
will appear that the results are not perfectly uniform, though 
perhaps as much as can be expected from the nature of the 
experiments. Thus the proportion of permanent gases to the 
ammonia decomposed (the nitrogen being actually measured, 
and the hydrogen estimated by doubling the oxygen expend- 
ed ) may be observed to differ considerably ; the highest pro- 
duct being 198%, and the lowest 180.2, from 100 of ammonia. 
