400  Comparison  of  Galenical  Preparations.        {^Aug^uat  i883™' 
of  stronger  ether  and  alcohol,  P.  G.,  the  last  process  yielding  a  brown 
oleoresin. 
Extractum  Digitalis  is  prepared  like  Extr.  Bellad.  alcoh.,  TJ.  S.^  and 
Extr.  Bellad.,  P.  G. 
Extractum  Ergotce,  TJ.  S.  Extractum  Secalis  cornuti,  P.  G. — Evap- 
orate 5  parts  of  fluid  extract  of  ergot  (made  with  a  mixture  of  alco- 
hol 3  parts  and  water  4  parts,  and  containing  about  5  per  cent,  of 
dilated  hydrochloric  acid  to  1  part,  at  a  temperature  not  exceeding 
50 °C.  U.  S. — Macerate  ergot  10  parts  with  water,  evaporate  to  5 
parts,  add  5  parts  of  alcohol,  spec.  grav.  '894,  after  3  days  filter  and 
evaporate  to  a  thick  extract ;  treat  this  twice  with  its  own  weight  of 
alcohol,  '894 ;  decant  the  liquid  and  warm  the  residuary  thick  extract 
to  expel  the  alcohol ;  it  yields  a  clear  solution  with  water.    P.  G. 
Extractum  Filicis,  P.  G.  Oleoresina  Aspidii,  U.  8. — Exhaust  male 
fern  with  stronger  ether  by  pecolation,  U.  8.,  by  maceration,  P.  G. 
Extractum  Gentiance. — Exhaust  gentian  with  water  by  percolation, 
U.  8.,  by  maceration,  P.  G. ;  boil,  strain  and  evaporate  to  a  pilular 
consistence,  TJ.  8. ;  evaporate  to  2  parts,  dilute  with  cold  water,  filter 
and  evaporate  to  a  thick  extract.,  P.  G. 
Extractum  Hyoscyami  alcoholicum,  TJ.  8.  Extractum  Hyoscyami, 
P.  G. — Prepared  like  extract  of  belladonna,  except  that  the  U.  S.  P. 
formula  omits  the  glycerin. 
Extractum  Nucis  vomicce,  TJ.  8.  Extractum  Strychni,  P.  G. — Ex- 
haust nux  vomica  with  a  mixture  of  alcohol  8  parts  and  water  1  part, 
and  evaporate  to  a  pilular  consistence.  TJ.  8. — Digest  nux  vomica  first 
with  alcohol,  spec.  grav.  '894,  and  evaporate  to  dryness.    P.  G, 
Extractum  Opii. — Exhaust  opium  by  maceration  with  water,  and 
incorporate  with  the  extract  5  per  cent,  of  glycerin.  TJ.  8. — Exhaust 
powdered  opium  by  maceration  with  water,  and  evaporate  to  a  dry 
extract,  which  must  at  least  contain  17  per  cent,  of  morphine.    P.  G. 
Extractum  Quassice. — Jamaica  quassia  wood  is  exhausted  with  cold 
water,  and  the  extract  mixed  with  5  per  cent,  of  glycerin.  TJ.  8. — 
Surinam  or  Jamaica  quassia  wood,  with  the  bark,  is  exhausted  with 
boiling  water,  and  the  resulting  extract  evaporated  to  dryness.   P.  G. 
Extractum  Rhei. — Rhubarb  is  treated  first  with  alcohol,  afterwards 
with  diluted  alcohol ;  the  extract  is  to  be  of  pilular  consistence.  TJ.  8. 
— Ehubarb  is  exhausted  with  a  mixture  of  2  parts  of  alcohol  and  3 
parts  of  water ;  the  extract  is  to  be  dry.    P.  G. 
Extractum  Taraxaci. — The  expressed  juice  of  the  root,  gathered  in 
