1 8 Mr.  hunter  on  the  Heat , &c. 
exp.  IX.  The  moufe  was  put  into  a cold  atmofphere 
of  1 50  above  o,  and  left  there  for  fifteen  minutes; 
after  which,  the  thermometer  being  introduced  a fecond> 
time,  it  rofe  to  85°. 
exp.  x.  The  moufe  was  again  put  into  a cold  atmo- 
fphere for  fifteen  minutes  more;  and  the  thermometer 
being  then  introduced,  the  quickfilver  rofe  to  7 2°  only* 
but  gradually  came  up  to  83%  84°,  and  85°. 
exp.  xi.  It  was  put  a third  time  into  the  cold  at  mo— 
fphere,  and  allowed  to  ftay  there  for  thirty  minutes ; the 
lower  part  of  the  moufe  was  at  the  bottom  of  the  difliy, 
and  almoft  frozen;  the  whole  of  the  animal  was  a little 
numbed,  and  a good  deal  weakened..  When  the  ther- 
mometer was  introduced,  it  varied  according  to  the  dif- 
ferent parts  of  the  belly ; in  the  pelvis,  near  the  parts- 
moil:  expofed  to  the  cold,  it  was  as  low  as  62°;  in  the 
middle,  among  the  inteftines,  about  70°;  but  near  the 
diaphragm  it  rofe  to  8o°,  82°,  84°,  and  85°;  fo  that  in 
the  middle  of  the  body  the  heat  had  decreafed  io°. 
Finding  a variation  in  different  parts  of  the  fame  cavity 
in  the  fame  animal,  I repeated  the  fame  experiments^ 
upon  another  dormoufe. 
exp.  xii.  I took  a healthy  dormoufe,  which  had  been 
afleep  in  a room  in  which  there  was  a fire  (the  atmofphere 
at  64°) ; I put  the  thermometer  into  its  belly,  nearly  at  the 
middle, 
