■^'"rir'^iss?""' }  Fluid  Extracts  of  the  New  Pharmaeojxjeia.  69 
In  regard  to  the  use  of  glycerin,  the  Committee  has  directed  it  in 
seventeen  cases,  and  the  Philadelphia  College  recommended  it  in 
seventeen  also,  though  not  all  the  same  ones  ;  in  eight  cases  the  same 
quantity  was  recommended  by  both  ;  in  three  cases  the  Committee 
ordered  the  larger,  and  in  three  the  smaller  quantity. 
Alcoholic  strength  of  menstruum:  In  thirty-eight  cases  the  same 
strength  is  directed  by  both ;  in  twenty-one  cases  the  Committee  directed 
a  stronger,  and  in  ten  cases  a  weaker  menstruum. 
Quantity  of  menstruum  to  moisten  the  powder  previous  to  packing: 
In  twenty -seven  cases  both  agree;  in  fifteen  cases  the  Committee  direct 
more,  and  in  twenty-three  less. 
Reserved  percolates:  In  twenty -nine  cases  both  agree;  in  twenty- 
one  cases  the  Committee  reserves  more,  and  in  sixteen  cases  less  than 
the  Philadelphia  College  recommended. 
Taking  up  the  fluid  extracts  in  their  regular  order,  the  first  on  the 
list  is : 
ExTEACTUM  AcoNiTi  Fluidum. — Fluid  Extract  of  Aconite, — This 
appears  now  first  under  the  name  of  fluid  extract,  but  it  differs  from 
the  liniment  of  aconite  of  the  Pharmacopoeia  of  1870,  only  in  the 
absence  of  one-eighth  of  its  volume  of  glycerin;  it  is  made  from 
aconite  root,  which  is  now  the  only  ofBcinal  part  of  the  plant.  The 
menstruum  used  is  alcohol,  the  addition  of  one  per  cent,  of  tartaric 
acid  seems  to  be  unnecessary,  as  if  good  root  be  employed  there  can  be 
no  doubt  of  the  sufficient  activity  of  the  product. 
ExTRACTUM  Arnica  Radicis  Fluidum. — Fluid  Extract  of  Arnica 
Hoot. — This  is  also  a  new  preparation,  and  one  likely  to  prove  useful . 
the  menstruum  directed  is  diluted  alcohol,  which  is  now  conceded  to 
best  extract  both  arnica  root  and  flowers.  The  necessity  for  the  intro- 
duction of  a  tincture  of  arnica  root,  also,  is  not  apparent;  it  might  be 
supposed  that  the  tincture  of  the  flowers  and  the  fluid  extract  of  the 
root  would  sufficiently  represent  even  so  valuable  an  article  as  arnica. 
ExTRACTUM  Aromaticum  Fluidum. — Aromatic  Fluid  Extract — 
This  also  makes  its  first  appearance  in  the  present  Pharmacopoeia;  it  was 
not  on  the  list  recommended  by  the  Philadelphia  College  of  Pharmacy, 
but  is  one  of  the  eleven  added  by  the  Committee  of  Revision ;  it  is 
made  from  the  officinal  aromatic  powder  with  alcohol  as  the  menstruum, 
and  will  no  doubt  retain  its  properties  longer  than  the  powder  does,  but 
the  necessity  for  its  introduction  is  not  very  apparent. 
