﻿PROFESSOR 
  PIAZZI 
  SMYTH 
  ON 
  COMETARY 
  PHYSICS. 
  145 
  

  

  be 
  little 
  doubt, 
  from 
  the 
  pressing 
  nature 
  of 
  the 
  demand 
  for 
  advance 
  in 
  this 
  depart- 
  

   ment, 
  that 
  those 
  who 
  are 
  more 
  fortunately 
  situated, 
  must, 
  before 
  long, 
  perfect 
  

   and 
  employ 
  some 
  method 
  by 
  which 
  the 
  great 
  desideratum 
  for 
  inquiry 
  into 
  cometary 
  

   physics 
  may 
  be 
  obtained, 
  viz., 
  drawings, 
  wherein 
  every 
  feature 
  represented 
  shall 
  

   be 
  accompanied 
  by 
  numerical 
  statements 
  of 
  its 
  dimensions 
  and 
  brightness, 
  with 
  

   the 
  probable 
  error 
  of 
  each 
  determination. 
  Until 
  this 
  shall 
  have 
  been 
  done, 
  the 
  

   necessary 
  corrections 
  to 
  reduce 
  the 
  apparent 
  to 
  the 
  real 
  phenomena 
  cannot 
  be 
  

   undertaken, 
  and 
  I 
  shall 
  therefore 
  hope 
  to 
  return 
  to 
  the 
  subject 
  if 
  it 
  should 
  not 
  be 
  

   taken 
  up 
  in 
  the 
  meantime 
  by 
  any 
  one 
  better 
  able 
  to 
  conduct 
  it 
  to 
  a 
  successful 
  

   issue. 
  

  

  