of  Animals  and  Vegetables . xq 
middle,  between  the  thorax  and  pubis,  and  the  quick- 
lilver  rofe  to  740  or  750;  when  I turned  the  ball  towards 
the  diaphragm,  it  rofe  to  8o°;  and  when  I applied  it 
to  the  liver,  it  rofe  to  8 1 °~. 
exp.  xiii.  The  moufe  was  put  into  an  atmofphere  at 
200,  and  left  there  half  an  hour;  when  taken  out,  it  was 
Very  lively,  much  more  fo  than  when  put  in.  I intro- 
duced the  thermometer  into  the  lower  part  of  the  belly, 
and  it  rofe  to  910;  and  upon  turning  it  up  to  the  liver, 
to  930. 
exp.  xiv.  The  animal  was  put  back  into  the  cold  at- 
mofphere  at  30°  for  an  hour,  when  the  thermometer 
was  again  introduced  into  the  belly ; at  the  liver  it  rofe 
to  930;  in  the  pelvis,  to  920:  it  was  ftill  very  lively. 
exp.  xv.  It  was  again  put  back  into  the  cold  atmo- 
fpherc  at  190,  and  left  there  an  hour ; the  thermometer 
at  the  diaphragm  was  87°;  in  the  pelvis,  83°;  but  the 
animal  was  now  lefs  lively. 
exp.  xvi.  It  was  put  into  its  cage,  and  two  hours  after 
the  thermometer,  placed  at  the  diaphragm,  was  at  930. 
From  thefe  experiments  we  have  actual  heat  increafed 
and  decreafed  by  the  application  of  external  cold ; and 
likewife  the  heat  varied  according  to  the  powers  of  life, 
as  well  in  the  fame  parts,  as  alfo  in  the  different  parts, 
of  the  fame  animal;  for  at  firft  the  natural  heat  of  the 
D 2 animal 
