From: muratlanne@gmail.com   
      
   "Richard Smith"  wrote in message news:m1h5yyabun.fsf@void.com...   
      
   > ... then weigh and plot the mass-fraction ...   
      
   How do you weigh it?   
      
   I ask because accurate weighing is among the more involved and error-prone   
   operations in chemistry.   
      
   https://chem.libretexts.org/Ancillary_Materials/Demos_Techniques   
   and_Experiments/General_Lab_Techniques/Proper_Use_of_Balances   
      
   A general principle of measurement is try to be 10 times as accurate as you   
   require. With luck and practice the accumulating errors will still leave you   
   what you need, in your case the possible value of lost gold versus the cost   
   to recover it.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)