DE. E. FEAJN'KLAND’S EESEAECHES ON OEGANO-METALLIC BODIES. 
73 
of the specific gravity gave the following numbers : — 
Temperature of room .... 
Height of barometer .... 
Height of inner column of mercmy 
Weight of flask and gas .... 
Temperature in balance-case . 
Weight of flask and air . . . . 
Temperature in balance-case . 
Capacity of flask 
16°-0 C. 
762’8 mm. 
8-3 mm. 
31'7280 grms. 
15°-0 C. 
31'6665 grms. 
15°-0 C. 
141-5 cubic centimetres. 
From these data the specific gravity was calculated to be 1-3601. 
About nine-tenths of the gas was absorbed by an equal volume of recently boiled 
absolute alcohol. A preliminary examination proved the presence of binoxide of nitrogen, 
a combustible gas absorbable by fuming sulphuric acid, and an incombustible residue 
containing combined oxygen. 
The estimation of binoxide of nitrogen was efiected by adding an excess of oxygen to 
a known volume of the gas in presence of caustic potash, the excess of oxygen being 
subsequently removed by pyrogallate of potash. Three determinations gave the follow- 
ing results : — 
I. 
Pressure of gas used (dry) 178-9 mm. 14°-0 C. 
Pressure after absorption of binoxide of nitrogen (dry) 16 4* 3 14°-0 
II. 
Pressure of gas used (dry) 104-7 13°-0 
Pressure after absorption of NO 2 (dry) 95-2 13°-0 
HI. 
Pressure of gas used (dry) 147*8 13°-0 
Pressure after absorption of NO 2 (dry) 133*8 13°-0 
Estimation of gas absorbed by fuming sulphuric acid, subsequent to the removal of 
binoxide of nitrogen. 
IV. 
Pressure of gas used (dry) 
Pressure after action of fuming SO 3 (dry) . . . 
. 243*3 mm. 
. 177-8 
13°-5 C. 
13°-5 
V. 
Pressure of gas used (dry) 
Pressure after action of fuming SO 3 (dry) . . . 
. 164-3 
. 121-1 
14°-0 
14°-0 
