m.  Jour.  Pharro.  \ 
July,  1900.  J 
Substitute  for  Alcohol. 
315 
rate  of  exhaustion  impracticable.  The  powders  should  have  been 
of  the  same  degree  of  fineness.  So  far,  however,  as  the  table  goes, 
it  shows  the  U.S.P.  menstruum  to  be  the  best  for  exhaustion. 
But,  in  comparing  the  resulting  fluid  extracts,  the  acetic  acid 
menstruum  yields  much  the  best  preparations  in  every  respect. 
RATK  AND  DEGREE  OF  EXHAUSTION. 
Rhamnus  Frangula, 
Buckthorn. 
Rhamnus  Purshiana, 
Cascara. 
DIFFERENCES. 
Differ 
ENCES. 
Fractious  of  Percolate. 
U  S.P. 
Menstruum. 
Acetic  Acid 
Mt  nstruuni . 
U.S.P. 
Menstruum. 
Acetic  Acid 
Menstruum. 
Grammes. 
Grammes. 
Grammes. 
Grammes. 
9  55 
8-38 
12-28 
II"27 
8'oS 
6*88 
"•33 
10-45 
3d     "  '   
5'7i 
5*34 
10-56 
9-21 
3  "94 
3'3i 
936 
8-oo 
5th    "  "   
274 
2-68 
6-13 
6-12 
6th   "  "   
1-62 
148 
4'55 
4-84 
7th   "  "   
ri6 
1-05 
2-18 
3-08 
•93 
Vox 
•33 
i"37 
9th   "  "   
•92 
64 
•21 
77 
10th   "  "   
"47 
•62 
"00 
"47 
nth    "  "   
•40 
•40 
•13 
'39 
12th   "  "   
'24 
•48 
•07 
•20 
13th   "  "   
23 
•25 
"02 
•29 
14th   "  "  
•41 
•46 
•II 
•25 
•19 
•22 
•00 
•14 
■00 
•26 
■00 
•19 
17th   «'     I)                     ,  x  . 
•13 
•10 
•00 
•67 
3672 
33'56 
57"3i 
57  *  1 1 
The  U.S.P.  fluid  extracts  of  both  buckthorn  and  cascara  are 
intransparent,  almost  black,  of  the  consistence  of  thin  syrup,  and 
have  a  considerable  deposit. 
Those  from  acetic  acid  are  also  intransparent  but  less  black,  of 
thinner  consistence,  and  with  very  little  deposit. 
