[ 3°3 ] 
Experiments, to know, if fome only of thefe 18 
Stigmata of a Caterpillar might not be fufficient 
for the Purpofes of Rcfpiration : He has plunged 
fome of them only partially in Water, fometimes 
by the Tail, and others by the Head foremoll: ; but 
' always fo that either 2 or more Stigmata might be 
out of the Water j and in thefe Cafes the Cater- 
pillar has not fallen into the torpid State above- 
mentioned, as it conftantly did when intirely im- 
merfed. He has lifted out of the Water fome of 
the Stigmata of Caterpillars that had been quite im- 
merfed, and that were fo become torpid and mo- 
tionlefs i and thefe have alfo foon after fhewn Signs 
of Life and Motion. One of the Caterpillars, upon 
which Mr. Bonnet made Experiments, lived 8 Days, 
fufpended in the Water, and only expofing to the 
Air its pofterior Stigmata that is to fay, that only 
the 2 laft Stigmata were out of the Water. ' 
He during this time carefully obferved his Ca- 
terpillar 5 and he remarked, from time to time, 
when the lnfcft moved itfelf, that little Streams of 
Bubbles came out of the anterior Stigma on the left 
Side. It appeared to him, by this and fome other 
Experiments, that amongft all the 1 S Stigmata , 
the two anterior arid the two pofterior ones are 
of a greater Ufe for the Refpiration of the Ca- 
terpillars than any of the others. He alfo found, 
that, upon the choaking up thefe Stigmata with 
Butter, the Animal feemed to fuffer much more 
fenlibly, than when he fo choaked up all the inter- 
mediate ones. 
All thefe Experiments of Mr. Bonnet , and which 
are very particularly detailed in his Paper, were made 
R r 2 with 
