TINCTURA  OPII  CAMPHORATA. 
61 
ON  TINCTURA  OPII  CAMPHORATA. 
By  J.  B.  Moore. 
R.  Powdered  Opium,  No.  50. 
Benzoic  Acid,        .       .  aa.  sixty  grains. 
Camphor,       .        .        .       forty  " 
Oil  of  Anise,  ...       a  fluidrachm. 
Clarified  Honey,     .       .       two  troy  ounces. 
Alcohol. 
Hot  Water,  temp*.  200°,     aa.  one  pint. 
Diluted  Alcohol,  q.  s. 
Pour  the  hot  water  upon  the  powdered  opium  in  a  covered  ves- 
sel, stir  well,  and  when  sufficiently  cool,  transfer  to  a  stoppered 
bottle,  and  macerate  with  occasional  agitation  for  three  hours  ; 
then  strain  the  infusion  through  muslin,  with  expression,  mace- 
rate the  residuum  with  the  alcohol  in  a  stoppered  bottle,  in  like 
manner,  for  three  hours  longer,  then  strain  and  express  as  before. 
Mix  the  infusion  and  filter,  and  upon  the  drugs  packed  in  a 
small  glass  percolator,  pour  gradually  the  filtered  mixture,  and 
when  it  has  all  passed,  continue  the  percolation  with  diluted 
alcohol  until  two  pints  of  tincture  are  obtained. 
Then  dissolve  the  camphor  in  the  oil  of  anise  in  a  mortar,  and 
to  the  solution  add  the  benzoic  acid  and  rub  well ;  to  this  add 
gradually  the  honey  and  rub  until  a  smooth  mixture  is  formed. 
Lastly,  add  this  to  the  two  pints  of  tincture  first  obtained,  shake 
well  and  filter. 
This  is  an  expeditious  mode  of  making  paregoric,  and  afi'ords 
a  faultless  preparation.  When  carefully  manipulated,  the 
opium  is  so  thoroughly  exhausted  as  to  be  deprived  of  taste. 
The  mixed  infusions  are  directed  to  be  filtered  before  percola- 
tion, in  order  to  remove  the  resin  and  caoutchouc  taken  up  by 
the  alcohol  and  which  separate  when  the  infusions  are  mixed, 
which,  if  not  previously  removed,  somewhat  embarrasses  perco- 
lation. 
The  filtration  and  percolation  can  both  be  conducted  at  the 
same  time,  and  the  filtrate  supplied  to  the  percolator  as  it  passes. 
When  the  tincture  is  prepared  in  the  quantity  of  a  gallon  or 
