FORMULA  FOE  THE  FLUID  EXTRACTS. 
543 
conical  percolator,  cover  the  surface  with  a  disc  of  cloth,  and 
pour  on  diluted  alcohol  until  three  pints  have  passed,  reserving 
the  first  pint.  Evaporate  the  reserved  tincture  at  a  gentle  heat 
till  reduced  to  six  fluid  ounces,  mix  the  sugar  with  the  remain- 
der, and  evaporate  it  to  ten  fluid  ounces,  mix  this  with  the  con- 
centrated tincture,  and  having  triturated  the  oils  with  the  car- 
bonate of  potassa,  dissolve  them  in  the  fluid  extract,  and  strain. 
Fluid  Extract  of  Semna  and  Pinkroot  may  also  be  prepared  in 
the  following  manner : 
Take  of  Fluid  Extract  of  Pinkroot,  ten  fluid  ounces. 
Fluid  Extract  of  Senna,  six  fluid  ounces. 
Carbonate  of  Potassa,  half  an  ounce. 
Oil  of  Caraway  and  Oil  of  Anise,  each  20  minims. 
Mix  the  fluid  extracts  and  dissolve  in  them  the  carbonate  and 
oils  previously  triturated  together. 
Remarks.— Fluid  Extract  of  Spigelia  and  Senna  made  by  the 
above  recipes  varies  slightly,  theoretically,  from  the  officinal; 
the  proportion  of  the  two  main  ingredients  is  slightly  varied  so 
as  to  make  them,  taken  together,  an  ounce  to  the  fluid  ounce. 
The  manipulation  is  calculated  to  afford  a  better  preparation 
than  the  officinal  recipe.  The  second  formula  will  be  found  a 
great  convenience  in  making  the  preparation  extemporaneously, 
in  the  quantity  it  may  be  needed. 
EXTRACTUM  RHEI  ET  SENILE  FLUIDUM. 
Take  of  Fluid  Extract  of  Rhubarb,  four  fluid  ounces. 
Fluid  Extract  of  Senna,  twelve  fluid  ounces. 
Bicarbonate  of  Potassa,  in  powder  half  an  ounce. 
Tincture  of  Ginger,  a  fluid  ounce. 
Oil  of  Cloves,  eight  minims. 
Oil  of  Anise,  sixteen  minims. 
Dissolve  the  Bicarbonate  of  Potassa  in  the  fluid  extracts,  and  add 
to  them  the  oils  previously  dissolved  in  the  tincture  of  ginger, 
and  mix  them. 
Remarks. — This  preparation  is  an  extemporaneous  imitation 
of  a  recipe  published  in  the  25th  volume  of  the  American  Jour- 
nal of  Pharmacy,  page  23.  It  is  believed  to  possess  sufficient 
merit  to  have  a  place  in  a  general  collection  of  the  fluid  extracts. 
