THE PHEXOMEHA OF HUMAN RESPIRATION. 
23 
Table showino- that the Fall of the Barometer is attended by a Beductlon in the 
Volume of air Expired (reduced) for 1 grm. CO 3 (temperatiu’es 17°'3 C. to 
21°'7 C.), William Alderwood under Experiment. The experiments are 
divided into two groups—those attended with the highest barometer readings 
and those with the lowest. 
Q to 2 Hours, 
mm. 
Liti-es. 
1st group.—Mean highest barometer 
. 765-9 
Relations (i.e., vol. air expired per 
1 
g7-m. CO.i) .... 
. 9-423 
2nd „ Mean lowest barometer 
. 754-1 
. 
. 9-228 
Diffei’ence .... 
. 11-8 
Fall for 11-8 mm. 
= 0-195 
Number of Experiments, 11. 
2 to i Hours. 
mm. 
Litres. 
1st group.—Mean highest barometer 
. 767-0 
Relations ... . 
. 9-322 
2nd ,, Mean lowest barometer 
. 747-7 
. 
. 9-180 
Difference .... 
. 19-3 
Fall for 19-3 mm. 
= 0-142 
Number of Experiments, 11. 
4 to (3 Hours. 
mm. 
Litres. 
1st group.—Mean highest barometer 
766-4 
Relations. 
. 9-838 
2nd „ Mean lowest barometer 
. 746-2 
,, ........ 
9-684 
Difference .... 
20-2 
Fall for 20-2 mm. 
= 0-154 
Number of Experiments, 27. 
Extremes. 
(Temperatures, 17°‘3 to 
0 to 
2 Hours 
after Food. 
The three Highest and three Lowest Pressures and coi'responding Relations. 
mm. 
1st group.—Mean highest barometer . 769’5 
2nd ,, Mean lowest barometer . 751'.5 
Litres. 
Relations . ..9'517 
•.9-080 
. 
Fall hu’ 18 mm. = 0-437 
Difference 
18-0 
