PROFESSOR GRAHAM ON THE MOTION OF GASES. 
619 
Mean Results. 
Gauge barometer. 
Air. 
Carburetted 
hydrogen. 
Olefiant 
gas. 
DOCAh+lOCO. 
Air. 
From 28"5 to 23-5 inches < 
rTime in seconds 
Time of air= 1 
_ Time of oxygen = 1 — 
521-5 
318- 
0-6118 
0-5506 
300 
0-5763 
0-5186 
316-5 
0-6080 
0-5472 
The results for olefiant gas can be considered only as approximative from the cir- 
cumstance that the gas was always contaminated by a small quantity of carbonic 
oxide, varying from 3 to 5 per cent., and a sensible trace of the dense gas or vapour, 
to which allusion has already been made. Both impurities would tend to raise the 
number for olefiant gas ; ten per cent, of carbonic oxide purposely added to that 
gas, raising its number from 0*5186 to 0*54/2. The calculated mean rate of the last 
mixture is 0*5513, taking the rate of carbonic oxide at 0*8/00, and that of olefiant gas 
at 0*5186. If the true coefficient for olefiant gas should be a whole number, it may 
be expected to be 0*5, or exactly one-half of the rate of oxygen. 
8. Transpiration of Nitric Oxide. 
Table XXXV. — Transpiration by Capillary E into a one-pint jar. Barom. 30*45. 
Temp. 52°. 
I Gauge barometer in inches. 
Air. 
Nitric oxide. 
Oxygen. 
Air. 
I. 
I. 
II. 
I. 
1 . 
| 
// 
// 
// 
// 
// 
28 
0 
0 
0 
0 
0 
20 
135 
135 
131 
149 
135 
j 12 
167 
162 
162 
186 
169 
8 
118 
115 
115 
133 
118 
4 
189 
183 
184 
206 
188 
2 
192 
184 
188 
219 
195 
| From 28 to 4 inches ... 
609 
595 
592 
674 
610 
Mean Results. 
Gauge barometer. 
Air. 
Nitric oxide. 
Air. 
r, . . . , ( Time in seconds 
From 28 to 4 inches < . 
[ lime ot oxygen = 1 ... 
609 
0-9035 
593-5 
0-8805 
610 
0-9035 
4 L 2 
