1 412.].  The  several  eaases  of  the  iiK^reased  action  of  the
intestines  may  be  referred,  I  think,  ia  the  first  place,  to
'    two  general  head&.
Tne  Jirst  is,  of  the  diseases  of  certain  parts  of  the  body
which,  either  from  a  oonsent  of  the  intestines  with  these
partsy  or  from' the  relation  which  the  intestines  have  to  the
whole  system,  occasion,  an  increased  action  in  the  intes-
tines, without  the  transference  of  any  stimulant  matter  from
the  primary  diseased  part  to  them..
The  second  head  of  the  causes  of  the  increased  action  of
the  intestines  is  the  stimuli  of  various  hinds,  which  are  ap-
plied directly  to  the  mtestines  themsel^ves.
1473.]  These  affections  of  other  parts  of  the  system
may  affect  the  intestines  without  transference  or  appli*


45a  PRACTICE  OF  PHYSIC;

cation  of  aoy  of  the  stimulant  matter,  we  learn  fipm  fa^ice
that  the  passions  of  the  mind  do  in  some  persons  excite^
diarrhoea.
1474.]  That  diseases  in  other  parts  may  in  iike  maimer
affect  the  intestines,  appears  from  the  dentition  of  infants
frequently  exciting  diarrhcea.  I  belieire  that  the  gout  of-
ten affords  anoth^  instance  of  the  same  kind ;  and  proba-
bly there  are  others  also,  though  not  well  ascertains.
1475.]  The  stimuli  (1472.)  which  may  be  applied  to
the  intestines  are  of  very  various  kinds  ;  and  are  eiuer,

1.  Matters  introduced  by  the  mouth.
2.  Matters  poured  into  the  intestines  by  the  several  ex**
cretories  opemng  into  them.
3.  Matters  pourid  from  certain  preternatural  openings
made  into  them  in  certain  diseases.
