184 
Fluid  Extracts  of  the  New  Pharmacopceia/  | 
Am.  Jour.Pharmr 
April,  1883. 
extract  made  by  either  of  these  formulas  yields  clear  solutions  in  all 
proportions  with  syrup,  simple  elixir,  and  sherry  wine. 
Of  the  two  formulas,  that  of  the  Philadelphia  College  of  Pharmacy 
seems  to  be  preferable  for  simplicity,  economy,  and  permanence  of  pro- 
duct; the  use  of  sugar  in  this  fluid  extract  would  not  have  been 
recommended  had  it  not  been  considered  to  have  a  decidedly  bene- 
ficial effect  in  preserving  the  preparation. 
ExTRACTUM  Quassia  Fluidum. — Fluid  Extract  of  Quassia. — 
This  is  one  of  the  eleven  added  to  the  list  by  the  Committee  of" 
Revision ;  the  menstruum  directed  is  diluted  alcohol,  which  will  no^ 
doubt  thoroughly  exhaust  the  drug. 
ExTRACTUM  Rhei  Fltjidum. — Fluid  Extract  of  Rhubarb. — For 
this  preparation  the  Pharmacopoeia  of  1870  directed  a  menstruum 
composed  of  fourteen  fluidounces  of  alcohol  and  two  fluidounces  of 
glycerin,  finishing  the  percolation  with  a  sufficient  quantity  of  a  mix- 
ture of  two  volumes  of  alcohol  and  one  of  water.  The  present 
Pharmacopoeia  directs  three  parts  of  alcohol  and  one  part  of  water^ 
and  the  Philadelphia  College  of  Pharmacy  recommended  the  same- 
menstruum. 
After  many  preliminary  experiments,  seven  samples  were  prepared' 
in  August,  1879,  the  menstruum  employed  for  each,  the'  results- 
obtained,  and  the  present  condition  of  the  product  of  each  of  the  series- 
is,  for  the  convenience  of  comparison,  arranged  in  tabular  form. 
Number.  | 
Menstruum. 
Per    cent,  of 
glycerin. 
Reserve  per- 
colate. 
Sp.    grav.  of 
fluid  extract. 
Per   cent,  of 
dry  extract. 
Per    cent,  of 
dry  residue. 
1 
A2.W1. 
75 
1-133 
40-30 
51-15 
2 
A3.  Wl. 
75 
1-102 
40-17 
51-80 
3 
A4.  Wl. 
75 
1-094 
40-10 
53-30 
4 
A2.  Wl. 
20 
65 
1-192 
60- 
51-25 
5 
A5.  Wl. 
20 
70 
1-147 
60- 
51-50 
6 
Alcohol 
20 
75 
1-114 
50- 
57-42 
7 
Alcohol 
20 
75 
1-108 
50- 
57-39 
Present  condition  of  fluid, 
extract. 
Moderate  precipitate,  thick, 
and  lumpy. 
Very     slight  precipitate,. 
rather  thick,  but  good. 
Very     slight  precipitate,. 
thin,  very  good. 
No  precipitate,  very  thick,, 
barely  fluid. 
Precipitate  on  bottom  and. 
sides,  thick  and  bad. 
Very  large   precipitate  on 
bottom  and  sides,  thin. 
Same  as  number  six. 
