This  is  the  most  ordinary  condition  of  the  true  virulent  bubo  :
and  all  that  has  been  said  on  the  ulcerating  stage  of  chancres
is  applicable  here.  It  becomes  necessary,  in  these  states,  to
destroy  the  diseased  surface  of  the  sore  by  means  of  caustics;
and  for  this  purpose  the  nitrate  of  silver,  the  mineral  acids,
the  acid  nitrate  of  mercury,  or  the  powder  of  cantharides
may  be  employed ;  the  latter  remedy  is  largely  employed  by
Ricord.  The  dressings  best  suited  to  this  form  of  bubo  are
Ricord's  aromatic  wine,  with  or  without  opium  or  tannin  ;  this,
as  in  the  case  of  chancre,  may  be  alternated  with  some  diges-
tive ointment,1  solutions  of  the  sulphate  of  copper  or  zinc,  or
a  weak  solution  of  the  chlorides  of  lime  or  soda.  Creosote
is  also  very  useful  as  a  local  application,  more  or  less  diluted.
235.  In  chronic  open  indolent  bubo,  with  a  foul  surface,  Chronic
where  most  remedies  have  failed  in  modifying  the  condition  of  indolent
the  sore,  M.  Cullerier  employs  occasionally,  as  a  caustic,  three,

four,  or  five  grains  of  the  bichloride  of  mercury  dusted  over
the  surface  of  the  sore,  and  suffered  to  remain  for  some  hours.
