24  Mh  hunter  on  the  Heat , See. 
and  found  that  the  quickfilver  rofe  as  high  as  103% 
i°3°t>  and  in  one  of  them  to  104°. 
exp.  xxiy.  I made  the  fame  experiments  on  feveral 
cocks,  and  the  refult  was  the  fame. 
exp.  xxv.  To  determine,  if  the  heat  of  the  hen  was 
increafed  when  fhe  was  prepared  for  incubation,  I re- 
peated the  twenty-third  experiment  upon  feveral  fitting 
or  clocking  hens ; in  one  the  quickfilver  rofe  to  104°;  in 
the  others,  to  1034,  10  30,  as  in  the  twenty-third  expe- 
riment. 
exp.  xxvi.  Under  the  hen,  who  raifed  the  quickfilver 
to  10 40, 1 placed  the  ball  of  the  thermometer,  and  found 
the  heat  there  as  great  as  in  the  redtum. 
exp.  xxvii.  I took  fome  of  the  eggs  from  under  the 
fame  hen,  where  the  chick  was  about  three  parts  formed, 
broke  a hole  in  the  fliell,  See.  and  introduced  the  ball  of 
the  thermometer,  and  found  that  the  quickfilver  rofe  to 
99°4*  In  fome  that  were  addled,  I found  their  heat  not  fo 
high  by  two  degrees;  fo  that  the  life  in  the  living  egg 
aflifted  in  fome  degree  to  fupport  its  own  heat. 
It  may  be  afked,  whether  thofe  three  or  four  degrees 
of  heat,  which  are  found  in  the  fowl  more  than  in  the  qua- 
druped, are  for  the  purpofe  of  incubation  ? We  found  that 
the  heat  of  the  eggs,  which  was  caufed  and  fupported  by 
this  heat,  was  not  above  the  ftandard  of  the  quadrupeds ; 
and 
