H28.]  T^HE  painful  sensations  referred  to  the  stomachy
X  anci  wbich  are  probably  occasioned  by  re^
affections  of  this  organ,  are  of  different  kinds.  ProbabJy
they  proceed  from  a&ctipns  of  different  natures,  and  shovilq
therefore  be  di$tingi^isbed  by  diSereot  appellations  ;  but  t
must  pwn  that  the  utmost  precision  in  tliis  matter  will  be
difficult.  In  my  essay  towards  a  methodical  Nosp^ogy,  I
have,  however,  attempted  it.  For  those  pains  that  ar^
either  acute  and  pungent,  or  accompanied  with  a  sen^e  of
distention,  or  with  a  sense  of  constriction,  if  they  are  at
'  the  sapie  time,  uot  attended  with  any  sense  of  acrimonjf
or  heat,  I  employ  the  appellation  of  Gastrodyiua*  To  ex-
press* those  painful  or  uneasy  sensations  which  seem  to  arijse
from  a  sense  of  acrimony  irritating  the  part,  or  from  such  a
sense  of  heat  as  the  apjuication  of  acriqs,  whether  externally
or  internally  appliea,  often  ^ives,  I  employ  the  term  of
Cardialgia ;  and  oy  this  I  parUcuJarly  mean  to  denote  those
feqiines  which  are  expressed  by  the  term  Heartburn  in  the
En^^Ush  language.  I  think  the  term  Soda  has  been  com-
monly employed  by  practical  writers  to  express  an  a£S^tion
attended  with  feelings  of  the  latter  kind.
1429.]  Beside  the  pains  denc^d  by  the  t^ms  Gastrody-
nia,  Periadynia,  Cardialgia,  and  Soda^  there  is,  I  think
uiother  painful  sensation  different  from  all  of  these,  which.
