Mr.  Roxburgh’s  Meteorological  Diary , See.  181 
fell  here.  I have  now  got  a tin  cylinder,  5~ths  inches  in 
diameter,  or  i6^ths  inches  in  circumference,  and  30 
inches  deep : the  quantity  of  rain  that  falls  1 intend  to  mea- 
fure  with  a fcale  divided  into  inches  and  twentieths  of  an 
inch;  the  depth  fhall  be  fet  down  every  morning  if  it 
has  rained.  I have  it  placed  on  the  roof  of  my  houfe, 
which  is  about  twenty-five  feet  high  ; at  a confiderable 
diftance  from  any  other  building,  See.  except  the  hofpi- 
tal,  which  is  diftant  about  one  hundred  yards,  and  of  the 
fame  height;  no  trees  above  twelve  feet  high  within 
many  hundred  yards. 
The  thermometer  without  doors  I have  placed  under 
a fmall  fhady  tree,  through  which  the  Sun  cannot  pene- 
trate, at  the  fame  time  it  is  well  expofed  to  air  and  wind. 
Every  inch  on  the  fcale  of  the  barometer  I ufe  is  divided 
into  twenty  equal  parts;  it  is  a portable  one,  made  by 
RAMSDEN. 
The  tube  of  the  thermometer  without  doors  is  twelve 
inches  long,  placed  upon  a plain  open  box-wood  fcale, 
made  by  nairne  and  blunt. 
A a 2 
1776. 
