PROFESSOR GRAHAM ON THE MOTION OF GASES. 
595 
Mean Results. 
Gauge barometer. 
Air. 
Hydrogen. j 
From 28 to 20 inches 
From 20 to 12 inches - 
From 12 to 4 inches - 
From 4 to 2 inches < 
From 28 to 4 inches < 
f Time in seconds 
Time of oxygen = 1... 
f Time in seconds 
Time of oxygen = 1 ... 
f Time in seconds 
Time of oxygen = 1 ... 
f Time in seconds 
[ Time of oxygen — 1 ... 
f Time in seconds 
Time of oxygen = 1 ... 
150-25 
0-9037 
181-75 
0-9031 
321 
0-9061 
653 
0-9047 
70-75 
0-4255 
87 
0-4322 
155-5 
0-4389 
94-5 
0-4405 
313-25 
0-4340 
! 
From 28 to 2 inches - 
f Time in seconds 
[Time of oxygen — 1... 
407*75 I 
0-4355 
Table IX. — Transpiration by Capillary A into a one-pint jar. Barom. 29*5. 
Temp. 58°*5. 
Gauge barometer in inches. 
Air. 
Oxygen. 
Carburetted hydrogen. 
Carbonic acid. 
I. 
II. 
I. 
II. 
I. 
11. 
I. 
II. 
// 
// 
// 
// 
/✓ 
// 
// 
it 
28 
0 
0 
0 
0 
0 
0 
0 
0 
20 
150 
150 
166-5 
166 
94-5 
94-5 
131 
131 
12 
182-5 
182 
202 
201-5 
118-5 
119 
158 
158 
4 
318-5 
318 
359-5 
357 
198-5 
198 
272 
271 
2 
190-5 
192 
217 
216 
119 
118 
159 
159 
From 28 to 2 inches 
841-5 
842 
945-5 
940-5 
530-5 
529'5 
720 
719 
Mean Results. 
Gauge barometer. 
Air. 
Carburetted hydrogen. 
Carbonic acid. 
From 28 to 20 inches < 
From 20 to 12 inches < 
From 12 to 4 inches < 
From 4 to 2 inches < 
r Time in seconds 
Time of oxygen =1... 
Time in seconds 
Time of oxygen = 1 ... 
Time in seconds 
Time of oxygen = 1... 
i Time in seconds 
Time of oxygen=l... 
150 
0-9022 
182-25 
0-9033 
318-25 
0-8914 
191*25 
0-8833 
94-5 
0-5684 
118-75 
0-5886 
198-25 
0-5505 
118-5 
0-5473 
131 
0-7879 
158 
0-7831 
271*5 
0-7600 
159 
0-7344 
From 28 to 2 inches < 
r Time in seconds 
Time of oxygen = 1 . . . 
841-75 
0-8928 
530- 
0-5622 
719-5 
0-7633 
It will be observed that the proportion between the times of oxygen and air is 
subject to a variation at different parts of the scale, but is so small as to be within the 
errors of observation ; while this nearly constant ratio of their times coincides almost 
with that of their specific gravities (1 to 0*9038 Regnault). 
The time or rate of hydrogen varies to the extent of 0*015 at different parts of the 
scale, the passage of that gas being relatively quicker at high than at low pressures. 
4 h 2 
