Analyfts of the Air. 309 
j Ox gall, and fpittlc, and urincj Oyfler-fhcll 
I and Milk generated a little air, but Limon 
juice and Milk did at the fame time abforb a 
little : Thus we fee that the variety of mix- 
tures in the ftomach appear fometimes to 
generate, and fometimes to abforb air j that 
is, there is fometimes more generated than 
abforbed, and fometimes an equal quantity, 
and fometimes lefs according to the propor- 
' tion the generating power of the diffoiving 
aliments bears to the abforbing power of the 
fumes which arife from them. In a true kindly 
I digeftion, the generating power exceeds the 
I abforbing power but a little : But whenever 
the digeftion deviates in feme degree from 
this natural Bate, to generate a greater pro- 
portion of claftick air, then are we trou- 
bled more or lefs with diftending Flatuses 
I had intended to make thefe and many more 
Experiments relating to the nature of digef- 
tion in a warmth equal to that ofthe ftomach, 
[ but have been hitherto prevented by purfu- 
' ing other Expetiments. 
I Thus we fee that all thefe mixtures do 
i in fermentation generate elaftick air, but 
thofe which emit thick fumes, charged with 
fulphur, reforb more than was generated 
X 3 
