[ 3SI ] 
in which, there fhould be a pond. Probably the yotmg 
birds, if the garden were large enough to find them 
food, would not be uneafy under their confinement. If 
this experiment fucceeded, it would be curious to ob- 
ferve them in the different degrees of torpidity during 
the winter. The intefiines might at different times be 
infpeched, and their analogy with thofe of the torpid 
bat carefully obferved. I have had an opportunity of 
examining the vifcera of feveral torpid bats. The in- 
teftinal tube ^yas perfe6tly empty, except about half an 
inch from the anus^ where there was a little hard faces. 
The gall-bladder \vas filled with a pellucid, yellowifli 
fluid. The ball of Fahrenheit’s thermometer being 
laid in the body of one of them, the heat of the blood 
at the heart raifed the quickfilver two degrees. In three 
others, opened at the fame time, no heat could be 
perceived, either by the thermometer or by the touch. 
Thefe experiments being made in the beginning of 
April, it is reafonable to fuppofe, that the bat which 
affected the thermometer, had begun to feel the ap- 
proaching feafon. I think there is reafon to believe, 
from the fmall quantity of faces in the inteflines, and 
from its being fo near X\iQanuSy that thofe animals, when 
they find themfelves growing torpid, take fufficient food 
to ferve them during the winter. All the animal func- 
tions in this flate are carried on exceedingly flow ; but 
that they do go on, in fome degree, is evident from their 
emptinefs, emaciation, and the faces^ Avhich are found in 
plenty underneath the place where they bang in duffers. 
VoL. JLXV. Bbb The 
