Pyrometry  and  Ar  some  try,  <kc.  315 
the  fixed  temperature,  and  would  mark  upon  its  branch, 
with  a thread,  the  point  to  which  it  finks:  afterwards  } 
would  mix  three  parts  of  water  with  feven  parts  of 
this  fame  fpirit  of  wine,  to  make  a fort  of  brandy  ftronger 
than  the  common ; it  would  be  the  three-Jifths  of  Lan- 
guedoc, which  confifts  of  two  parts  water  and  three 
parts  fpirit  of  wine  that  fires  gun-powder.  I would  again 
dip  the  Areometer  into  it,  at  the  fame  temperature,  and 
would  likewife  mark  this  new  point  with  a thread. 
One  may  fee  that,  according  to  the  principle  I have 
above  eftablifhed,  I take  points  of  comparifon  which  are 
within  the  limits  of  the  greatefi:  and  fmalleft  fpirituofity 
of  the  liquors  to  be  tried,  in  order  to  obtain  a fcale  of 
equal  parts,  free  from  any  fenfible  error : and  in  this  cafe 
that  precaution  is  very  neceffary ; for  the  degrees  of  fpi- 
rituofity 
branche,  le  point  ou  il  s’enfonceroit.  Puis  je  melerois  a 7 parties  de  cet  efprit 
de  vin,  3 parties  d’eau,  pour  en  faire  une  eau  de  vie  plus  forte  que  l’eau  de  vie 
commune;  ce feroit  le  trots  quints  de  Languedoc,  quid.oitetre  2 parties  d’eau 
fur  3 parties  d’efprit  de  vin  qui  brule  la  poudre.  J’y  plongerois  de  nouveau 
PAreometre  dans  la  meme  temperature,  et  je  marquerois  aufli  ce  nouveau  point 
par  un  fil. 
On  voit  que  fuivapt  le  principe  que  j’ai  etabli  ci-devant,  je  prends  des  points 
de  comparaifon  en  dedans  de  la  plus  grande  et  de  la  moindre  fpirituofite  des 
liqueurs  qu’on  eprouvera,  pour  obtenir  une  echelle  en  parties  egales,  fans  erreur 
fenfible : et  cela  eft  bien  neceflaire  ici ; car  les  degres  de  fpirituoftte  ne  fuivent 
Q,q  q 2 
