74  Fluid  Extracts  of  the  New  Pharmcwopoeia,  {^""rebyisss^™' 
ExTRACTUM  CiNCHOX.^:  Fluidum.  — Fluid  Extract  of  Cinchona. — 
Forthis  preparation  the  Pharmacopoeia  of 1 870  directed  as  the  men  struum^ 
alcohol  eight  fluidounces,  glycerin  three  fluidoiinces^  and  water  five 
tlnid  ounces,  finishing  the  percolation  with  diluted  alcohol.  The  pre- 
sent Pharmacopceia  directs  the  use  of  twenty-five  parts  of  glycerin  and 
seventy-five  parts  of  alcohol,  and  then  finishes  the  percolation  with  a 
sufficient  quantity  of  a  mixture  of  three  parts  of  alcohol  and  one  part 
of  ^\^ater.  The  Pliiladelj^hia  College  of  Pharmacy  recommended  a 
menstruum  composed  of  three  parts  of  alcohol  and  one  part  of  water, 
with  twenty  per  cent,  of  glycerin  in  the  first  one  hundred  parts.  This 
furnishes  a  fluid  extract  which  has  kept  several  years  with  only  a  very 
slight  precipitation,  the  officinal  menstruum  is  so  nearly  identical  that 
its  product  would,  no  doubt,  keep  as  well. 
ExTEACTUM  CoLCHioi  Radicis  Fluidum. — Fluid  Extract  of  Colchi- 
cum  Root. — As  the  menstruum  for  this  preparation,  the  Pharmacopoeia  of 
1870,  directed  alcohol  twelve  fluidounces,  glycerin  three  fluidounces^ 
and  water  one  fluidounce,  finishing  the  percolation  with  diluted  alco- 
hol. The  present  Pharmacopoeia  directs  two  parts  of  alcohol  and  one 
part  of  water,  the  Philadelphia  College  of  Pharmacy  recommended 
diluted  alcohol.  A  sample  of  the  fluid  extract  prepared  over  three 
years  ago  w^ith  diluted  alcohol,  is  at  the  present  time  of  a  deep  red 
color,  perfectly  transparent,  and  contains  only  the  slight  deposit  tjiat 
was  formed  soon  after  it  was  made.  There  seems  to  be  no  necessity 
for  the  use  of  the  stronger  officinal  menstruum. 
ExTRACTUM  CoLCHici  Semixis  Fluidum. — Fluid  Extract  of  Col- 
chicum  Seed. — The  menstruum  directed  for  this  preparation  in  the  Phar- 
macopceia of  1870,  was  alcohol  twelve  fluidounces,  glycerin  three  fluid- 
ounces,  and  water  one  fluidounce,  finishing  the  percolation  with  diluted 
alcohol.  The  present  Pharmacopceia  directs  two  parts  of  alcohol  and 
one  part  of  water;  the  Philadelphia  College  of  Pharmacy  recommended 
the  same  strength.  A  sample  of  fluid  extract  prepared  with  this  men- 
struum over  three  years  ago  remains  perfectly  clear  and  entirely  with- 
out deposit,  a  very  few  small  globules,  probably  of  oil,  are  noticed  on 
the  top,  this  would  most  likely  be  prevented  by  the  use  of  diluted  alco- 
hol as  the  menstruum,  and  this,  according  to  careful  experiments 
reported  in  the  Amer.  Jour.  Pharmacy,  Jan.,  1881,  p.  6,  is  strong 
enough  for  the  extraction  of  the  whole  of  the  alkaloid. 
ExTRACTUM  Coxii  Fluidum. — Fluid  Extract  of  Conium. — For  this 
fluid  extract  the  Pharmacopoeia  of  1870  directed  the  following  men- 
