More  powerful  ointmeuta  are  made  with  powdered  euphor-
binm  and  cantharides,  each  2  pitrta  ;  coTroBive  sublimate,  1
part ;  vaseliue,  8  parts ;  cerate,  12  parts ;  or,

Tar  and  resin,  each  4  parts ;  yellow  wax,  3  parts  ;  cotton-
seed oil,  10  parts ;  powdered  euphorbiom,  2  parts ;  canthar-
ides, 6  parts.  I
The  technique  of  blisteriog  consists  in  cntting  the  hair
and  washing  the  part  to  be  blistered,  and  rubbing  the
blister  long  and  thoroughly  into  the  skin.  The  animal  should
be  controlled  Viy  tying  up  the  head,  or  using  a  cradle,  or
side-bar  attached  to  the  halter  and  surcingle,  to  prevent
horses  from  biting  the  blistered  area.  The  tail  should  ba
tied  np  if  the  blister  is  applied  within  its  reach.  Dogs
should  be  muzzled,  but  are  apt  to  rub  the  sure  spot.  The
serum  discharged  from  the  blister  must  be  continually
sponged  off  with  soap  suds  and  water,  to  prevent  excoriation
of  the  subadjacent  skin,  or  the  latter  may  be  covered  with  a
solution  of  resin  in  alcohol,  by  means  of  a  brush.
The  blister  is  washed  off  in  36  or  48  hours  after  its
application,  and  vaseliue  should  thereafter  be  kept  on  the
part  The  use  of  can  th  arid  id  blisters  is  contraiudieated  in
wenk  Of  young  aniinab ;  on  the  flexures  of  joints ;  or  deli-
cate skin  on  the  inner  aspect  of  the  upper  part  of  the  limbs  ;
on  acutely  inflamed  areas  ;  and  in  renal  disease.
