ao  Mr.  hunter  on  the  Heat,  See. 
animal  was  much  below  the  common  ftandard,  and,  by 
the  application  of  cold,  and  the  powers  of  refinance 
to  the  cold  being  thus  increafed,  the  heat  was  confidera- 
bly  augmented;. but  when,  the  animal  was  weakened  by 
thofe  exertions,  it  fell  off  with  refpedl  to  the  power  of 
producing  heat,  and  this  in  proportion  to  the  diftance-. 
from  the  heart. 
Why  the  heat  of  this  animal  fhould  be  fo  low  as  80® 
i . 
in  an  atmofphere  of  between  50°  and  6o°,  is  not  eafily 
accounted  for,  except  upon  the  principle  of  fleep.  But' 
I fhould  very  much  fufpeef,  that  the  fimple  principle 
of  fleep  is  out  of  the  queftion,  as  fleep  is  an  effedt  that 
. takes  place  in  all  degrees  of  heat  and  cold.  In  thofe  ani-  • 
mals  where  the  voluntary  adtions  are  fufpended,  it  ap- 
pears to  be  an  effedl  arifing  from  a certain  degree  of 
cold  acting  as  a fedative, under  which  the  animal  faculties 
are  proportionably  weakened,  but  ftill  retain  the  power  of 
carrying  on  all  the  fundtions  of  life  under  fuch  circum- 
ftances ; but  beyond  this  degree  cold  feems  to  a£l  as  a fti- 
mulant,  and  the  animal  powers  are  roufed  to  adlion  for; 
felf-prefervation.  It  is  more  than  probable,  that  mod: 
animals  are  under  this  predicament  ; and  that  every  or-- 
der  has  its  degree  of  cold,  in  which  the  voluntary  adtions 
can  be  fufpended. 
When  man  is  afleep,  he  is  colder  than  when  awake; 
and  I find,  in  general*  that  the  difference  is  about  one  de- 
2,  gree 
