^ I o Amlyfis of the Air . 
be re-forbed again, by the fumes which arife 
with them 5 for we fee in Experiment 83 
that Oyfter-fhell and Vinegar, Oyfter-lhell 
and Rennet, Oyfter-lhell and Orange juice. 
Rennet alone, Rennet and Bread, firft generate 
ed and thenabforbed aiributOyfter-fhell with 
fome of the liquor of a Calve’s ftomach which 
had fed much upon Hay, did not generate air • 
and it was the fame with Oyfter-fhell and 
Ox gall, and fpittle, and urine 5 Oyfter-lhell 
and Milk generated a little air, butLimon 
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 ; 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 dilfolving 
aliments bears to the abforbing power of the 
fumes which arife from them. In a true kindly 
digeftion, the generating power exceeds the 
abforbing power but a little: But whenever 
the digeftion deviates in fome degree from 
this natural ftate, to generate a greater pro- 
portion of elaftick air, then are we trou- 
bled more or lefs with diftending Flatus s. 
I had intended to make thefe and many more 
Experiments 
