612 
PROFESSOR GRAHAM ON THE MOTION OF GASES. 
the proportion of 22*12 to 15*64. Carbonic oxide, it will be observed, is still sensibly 
more rapid in its passage than nitrogen. 
The experiments in the preceding and all other tables are put down in the order 
in which they were made. The observation with air is occasionally repeated, to find 
whether the rate of the capillary remains constant. 
Table XXVIII. — Transpiration by Copper Capillary into a three-pint jar. 
Barorn. 29*73. Temp. 57°. 
Gauge barometer in 
inches. 
Air. 
Oxygen. 
Nitrogen. 
Hydrogen. 
Carbonic acid. 
I. 
II. 
I. 
II. 
I. 
II. 
I. 
II. 
I. 
II. 
✓/ 
// 
// 
✓/ 
// 
// 
// 
// 
28 
0 
0 
0 
d 
0 
0 
0 
0 
0 
0 
20 
595 
595 
663 
660 
575 
577 
287 
287 
500 
502 
12 
736 
735 
818 
819 
713 
713 
358 
357 
616 
613 
8 
516 
517 
575 
577 
500 
501 
251 
252 
426 
428 
From 28 to 8 inches... 
1847 
1847 
2056 
2056 
1788 
1791 
896 
896 
1542 
1543 
Mean Results. 
Gauge barometer. 
Air. 
Nitrogen. 
Hydrogen. 
Carbonic acid. 
From 28 to 20 inches • 
From 20 to 12 inches < 
From 12 to 8 inches < 
f Time in seconds 
Time of oxygen=l... 
Time in seconds 
Time of oxygen =1... 
f Time in seconds 
Time of oxygen =1... 
595 
0-8994 
735-5 
0-8986 
516-5 
0-8967 
576 
0-8707 
713 
0-8711 
500-5 
0-8689 
287 
0-4339 
357*5 
0-4369 
251-5 
0-4366 
501 
0-7573 
614-5 
0-7507 
427 
0-7413 
From 28 to 8 inches < 
Time in seconds 
Time of oxygen =1... 
1847 
0-8984 
1789-5 
0-8704 
896 
0-4358 
1542-5 
0-7502 
The preceding results with air and nitrogen might be confounded with those ob- 
tained with capillary H. The rate of hydrogen is sensibly faster, while that of car- 
bonic acid is decidedly slower ; both gases diverging sensibly from their empirical 
rates 0*375 and 0*75, on the side of effusion, but the former very slightly. 
Table XXIX. — Transpiration by Copper Capillary into a six-pint jar. 
Barom. 30*14. Temp. 58°. 
Gauge barometer in 
inches. 
Air. 
Oxygen. 
Hydrogen. 
I. 
II. 
I. 
II. 
I. 
II. 
// 
✓/ 
// 
// 
// 
// 
28 
0 
0 
0 
0 
0 
0 
24 
614 
269 
271 
20 
1139 
1139 
1268 
654 
290 
290 
12 
1413 
1413 
1570 
1573 
698 
699 
8 
994 
993 
1109 
1110 
494 
495 
From 28 to 8 inches... 
3546 
3545 
3947 
3951 
1751 
1755 
