42  Mr'  hunter  on  the  Heat,  8cc. 
The  fame  thermometer  with  which  I made  my  for- 
mer experiments,  feven  inches  and  a half  long,  was  funk 
into  a long  feather  of  a peacock’s  tail,  with  a flit  upon 
one  fide  to  fliow  the  degrees;  by  this  means  the  ball  of 
the  thermometer  could  be  introduced  into  the  bottom  of 
the  hole. 
exp.  i.  March  29th,  I began  my  experiments  at  fix  in 
the  morning,  the  atmofphere  at  57°j,  the  thermometer 
in  the  tree  at  550;  when  it  was  withdrawn  the  quickfil- 
ver  funk  to  53%  but  foon  rofe  to  . 
This  experiment  was  repeated  three  times  with  the 
fame  fuccefs.  Here  the  tree  was  cooler  than  the  atmo- 
fphere ; when  one  Ihould  rather  have  expected  to  have 
found  it  warmer,  fince  it  could  not  be  fuppofed  to  have 
as  yet  loft  its  former  day’s  heat. 
exp.  xi.  April  4th,  half  paft  five  in  the  evening,  the 
tree  at  56°,  the  atmofphere  at  62°;  the  tree  therefore 
ftill  cooler  than  the  atmofphere. 
exp.  111.  April  5th,  wind  in  the  North,  a coldifh  day, 
fix  o’clock  in  the  evening,  the  thermometer  in  the  tree 
was  at  550,  the  atmofphere  at  47  the  tree  warmer 
than  the  atmofphere. 
(h)  The  finking  of  the  quickfilver  upon  being  withdrawn  I imputed  to  the 
evaporating  of  the  moifture  of  the  fluid  upon  the  ball. 
EXP-r 
