PROFESSOR GRAHAM ON THE MOTION OF GASES. 
G15 
Mean Results. 
Gauge barometer. 
Air. 
Carburetted 
hydrogen. 
Hydrogen. 
Carbonic 
oxide. 
Nitrogen. 
j Nitrous 
oxide. 
Carbonic 
acid. 
Air. 
From 28’ 5 J Time in seconds 
393 
241 
190-5 
380 
382 
332 
332 
396 
to 23*5 in. \ Time of ox. = 1 
0*8993 
0-5515 
0-4359 
0-8696 
0-8741 
0-7597 
0-7597 
0-9062 
This table exhibits the transpiration of the gases by E, in the upper part of the 
scale or into a vacuum nearly, the condition in which the subject is studied with 
most advantage. The coefficients exhibit a close correspondence with those found 
by the two preceding capillaries. The number for air is 08993 at the beginning, 
and 09062 at the end of the experiments ; a variation of rate to which this capillary 
appeared more liable than the others. The number for nitrogen, 0 - 8741, again slightly 
exceeds that for carbonic oxide, CF8696. Nitrous oxide and carbonic acid have the 
same number 0759 7 , which is in excess compared with O Jb ; while the number for 
hydrogen, (F4359, is slightly deficient compared with 04375. Carburetted hydrogen 
has the number 0’5515, and is wonderfully constant with all these long capillaries. 
As the time of transpiration in these experiments appeared rather short for exact 
results, a larger aspirator-jar was employed, and the experiment repeated with 
carbonic acid ; air and oxygen being added to give standards of comparison. 
Table XXXII. — Transpiration by Capillary E into a nine-pint jar. Baroin. 30136. 
Temp. 74°‘5. 
Gauge barometer in inches. 
Mr. 
Oxygen. 
Carbonic acid. 
I. 
II. 
I. 
II. 
I. 
II. 
// 
// 
// 
/✓ 
// 
// 
28-5 
0 
0 
0 
0 
0 
0 
26-5 
229 
229 
254 
254 
190 
191 
24-5 
233 
232 
259 
258 
195 
195 
23-5 
121 
121 
135 
135 
104 
103 
From 28-5 to 23-5 
583 
582 
648 
647 
489 
489 
Mean Results. 
Gauge barometer. 
Air. 
Carbonic acid. 
From 28*5 to 23-5 inches . 
L lime ot oxygen=l... 
582-5 
0-8996 
o 
tO 
to 
o 
00 
As the result for carbonic acid differed sensibly from the experiment of the pre- 
ceding table, it was considered desirable to return to the subject on the following 
day. In the meantime the barometer had fallen considerably, which accounts for 
the comparative slowness of transpiration in the following repetition of the last ex- 
periments. 
