^'"aSi883.'^'"  }    Fluid  Extracts  of  the  New  Pharmacopoeia.  185 
Number  two  is  the  formula  recommended  to,  and  finally  adopted  by, 
the  Committee  of  Revision ;  it  remains  at  present  in  good  condition, 
but  is  rather  thick  and  lumpy,  and  in  this  respect  only  is  inferior  tO' 
number  three,  which  has  kept  better  than  any  of  the  other  samples. 
From  the  rapidity  of  exhaustion,  and  the  appearance  of  the  fluid 
extract  when  first  made,  it  seemed  that  alcohol,  with  twenty  per  cent, 
of  glycerin  in  the  first  one  hundred  parts,  would  be  the  best  men-^ 
struum  for  this  drug;  therefore  two  samples,  numbers  six  and  seven,, 
were  so  prepared  to  more  thoroughly  test  the  menstruum ;  the  product 
precipitated  considerably  in  a  few  months,  and  now  contains  a  very 
large  deposit  on  the  bottom  and  sides  of  the  bottles,  the  remainder  of 
the  preparation  is  quite  fluid  and  transparent  in  thin  layers ;  sampler 
numbers  four  and  five,  which  also  contain  twenty  per  cent,  of  glycerin, 
likewise  proved  failures,  and  the  result  of  these  experiments  appears- 
to  fully  demonstrate,  not  only  that  glycerin  is  of  no  service  in  this- 
preparation,  but  also  that  its  employment  is  decidedly  detrimental  to- 
the  permanence  of  the  product.  Sample  number  three  having  under- 
gone no  change  since  its  preparation,  the  menstruum  therein  used,  four 
parts  of  alcohol  and  one  part  of  water,  is  recommended  in  place  of 
the  present  officinal  menstruum. 
ExTRACTUM  Rhois  Glabr^  Fluidum. — Fluid  Extract  of  Rhus^ 
Glabra. — This  is  a  newly-introduced  preparation  ;  the  Pharmacopoeia 
directs  diluted  alcohol,  with  ten  per  cent,  of  glycerin,  in  the  first  one- 
hundred  parts  of  the  menstruum.  The  Philadelphia  College  of 
Pharmacy  recommended  a  menstruum  composed  of  one  part  of  alcohol 
and  two  parts  of  water,  with  twenty  per  cent,  of  glycerin  in  the  first, 
one  hundred  parts ;  a  sample  thus  prepared  in  December,  1879,  con- 
tains now  only  a  minute  precipitate,  is  perfectly  fluid,  of  a  deep  red 
color,  and  transparent  in  thin  layers;  this  sample  has  kept  so  well 
it  would  seem  impossible  for  the  officinal,  or  any  other  menstruum,  to* 
yield  a  better  preparation. 
ExTRACTUM  Ros^  Fluidum. — Jtluid  Extract  of  Rose. — This  is 
one  of  the  eleven  added  to  the  list  by  the  Committee  of  Revision ;  the 
Pharmacopoeiix  directs  diluted  alcohol,  with  ten  per  cent,  of  glycerin 
in  the  first  one  hundred  parts  of  the  menstruum  ;  the  product  will  no 
doubt  well  represent  red  rose,  and  perhaps  prove  a  useful  addition  to 
the  practice  of  elegant  pharmacy ;  it  would  seem  that  this  fluid  extract 
might  as  well  have  been  directed  for  the  preparation  of  the  honey  of 
rose,  as  for  the  syrup. 
