48a  Mr.  de  luc  on 
Here  then  is  a fecond  inftance  in  thefe  experiments 
alone,  of  the  difference  there  may  he  between  the  laws 
that  follow  in  their  progrefs  different  effedts  of  the  fame 
caufes ; an  objedt  very  important  in  natural  philofophy, 
and  to  the  elucidating  of  which  I dedicate  the  fecond 
part  of  this  paper. 
PART 
Ainfi  voila  le  fecond  exemple,  dans  ces  experiences  feules,  de  la  difference 
qu*il  peut  y avoir  entre  les  loix  que  fuivent  lcs  differens  effets  des  memes  caufes ; 
objet  important  en  phyfique,  et  auquel  je  defline  la  fecond  partie  de  ce  Meraoire* 
SECONDS 
