28 
DR. W. MARCET ON A CHEMICAL INQUIRY INTO 
Table showing that the Fall of the Barometer is attended by a reduction in the 
Volume of Air expired (reduced) for 1 Grrn. COo. (C, F. Townsend under 
Experiment.) 
Barometer Readings and Relations from all the Experiments Divided 
INTO Two Groups. 
0 to 2 Hours after Food. 
Litres. 
]\tean highest barometer.74G'5 Relations (t.e., vol. air expired for 
1 grin, cop.I0-27;l 
Mean lowest barometer. 750‘4 ,, .10T39 
Diflerence.I4'l Fall for I4T mm. = 0T34 
Number of Experiments, 18. 
2 fo 4 Hours after Food. 
Litres. 
Mean highest barometer . 
Mean lowest barometer 
. . . 766-7 
. . . 753-9 
Relations 
. 10 533 
. 10-412 
Difference . 
. . . 12-8 
Fall for 12-8 mm. 
= 0-121 
Number of Experiments, 27. 
Mean highest barometer . 
Mean low.est barometer 
4 fo 6 Hours 
. . 761-2 
. . . 752-0 
( after Food. 
Relations 
?5 
Litres. 
. 11-157 
. 10-767 
Diflerence 
. . . 9-2 
Fall for 9-2 mm. 
= 0-390 
Number of Experiments, 11. 
Extremes. 
0 fo 2 Hours after Food. 
The Five Highest and Five 
Lowest Barometer Readings and Corresponding Relations. 
Litres. 
Mean highest barometer . 
768-6 Relations 
.10-424 
Mean lowest barometer 
. . 747-9 
.10-118 
Difference . . 
. . 20-7 
Fall for 20-7 mm. = 0-306 
2 fo 4 Hours after Food. 
The Seven Highest and Seven Lowest Barometer Readings and Corresponding Relations. 
Litres. 
Mean highest barometer. 770'9 Relations.lO’oOS 
Mean lowest barometer. 750'S ,, .lO'oOI 
Difference 
20T 
Fall for 20T mm. = 0-202 
