DE. E. EEANKLAJ^D’S EESEAECHES ON OEOANO-METALLIC BODIES. 
75 
IX. 
Pressure of gas used (dry) 55-7 ram. 13°-1 C. 
Pressui’e after admission of oxygen (dry) . . . . 22 3’ 8 13°‘l 
Pressui’e after explosion (dry) 193-1 13°-1 
Pressure after absorption of carbonic acid (dry) . . 164-5 13°-1 
Pressui-e after admission of hydrogen (dry) . . . . 709-8 13°-1 
Pressure after explosion (di-y) 339-5 13°-1 
Pressure after admission of oxygen (dry) . . . . 749-1 13°-1 
Pressure after explosion (dry) 295-7 13°-1 
Analysis No. VIII. shows that 104-3 volumes of gas, containing 27-8 volumes of the 
body removed by fuming sulphuric acid, consumed 83-0 volumes of oxygen and generated 
56-3 volumes of carbonic acid. In analysis No. IX. 55-7 volumes, containing 14-3 
volumes of the gas absorbable by fuming sulphuric acid, consumed 44-5 volumes of 
oxygen and generated 28-6 volumes of carbonic acid. The last three readings in this 
analysis also prove that the body removed by fuming sulphuric acid is free from nitrogen. 
The two analyses give the following proportions between the volumes of combustible 
gas, oxygen consumed, and carbonic acid generated : — 
V olume of combustible gas. 
I. II. 
27-8 14-3 
1 1 
Oxygen consumed. 
I. II. 
83-0 44-5 
2-99 3-007 
COg generated. 
I. II. 
56-3 28-6 
2-02 1-93 
The body removed by fuming sulphuric acid is therefore olefiant gas, one volume of 
which consumes tlu-ee volumes of oxygen and generates two volumes of carbonic acid. 
The whole of these eudiometrical experiments give the mean per-centage composition 
of the original gas as follows : — 
Binoxide of nitrogen 8-90 
Olefiant gas 24-24 
Protoxide of nitrogen 60-65 
Nitrogen 6-21 
100-00 
This result is contu-med by the above determination of the specific gravity of the gas, 
as is seen from the following calculations : — 
Binoxide of nitrogen . 
Protoxide of nitrogen 
Nitrogen . . . . 
Olefiant gas . . . 
Per-centage 
amount. 
Specific 
gravity. 
8-90 X 1-0365 = 
60-65 X 1-5202 = 
6-211 
9-2249 
92-2001 
24-24] 
100-00 
X -9674= 29-4573 
130-8823 
= 1-3088 
Found by experiment . 
100 
1-3601 
