Am.  Jour.  Pharm.  \ 
October,  1895.  { 
Abstracts  from  Theses. 
519 
which  were  weighed  in  these  estimations  were  pure  white  in  color. 
The  tannin  was  estimated  by  the  gelatin  and  alum  method.  The 
results  are  given  in  percentages  on  the  preceding  page. 
FLUID  EXTRACT  OF  CUBEB. 
Percy  Hyers,  Ph.G.,  determined  the  total  solids,  oil  and  fatty 
matter  and  resin  contained  in  some  samples  of  this  preparation 
which  he  purchased  in  the  market.  The  total  solids  were  estimated 
by  evaporating  a  known  weight.  An  examination  of  the  residues 
proved  the  absence  of  glycerin.  To  separate  and  estimate  the  oil 
and  fatty  matter,  a  quantity  of  the  fluid  extract  was  diluted  with  five 
volumes  of  acidulated  water,  and  this  mixture  shaken  with  several 
successive  portions  of  petroleum  ether.  After  this  treatment  the 
mixture  was  agitated  with  ether  to  remove  the  resin.  He  also  pre- 
pared a  fluid  extract  in  strict  accordance  with  the  official  directions, 
and  examined  it  in  the  same  manner.  The  results  were  the  follow- 
ing percentages  : 
Total  Color  of  Oil  and 
Solids.  Residue.  Fatty  Matter.  Resin. 
1                                          15*30  Brownish-green       11*92  4*22 
2                                        14*30  Green  7*86  3*98 
3  ....                               13*85  Dark  brown  7*60  4*06 
4                                   .     ii*97  "  8*90  4*o8 
Own                                   20*85  "  13*70  4*40 
The  author  found  that  ether  extracted  22-45  per  cent.;  acetone, 
18-48  per  cent.;  alcohol,  14-48  per  cent.,  and  petroleum  ether,  13  47 
per  cent,  of  the  weight  of  the  drug.  After  complete  exhaustion 
with  acetone,  the  drug  residue  yielded  less  than  1  per  cent,  of 
extractive  to  alcohol. 
GINGER. 
Robert  G.  Davis,  Ph.G.,  estimated  the  amount  of  the  oleoresin 
that  could  be  obtained  from  the  commercial  varieties  of  ginger  by 
the  use  of  the  official  process  for  the  preparation  of  that  article.  The 
following  table  states  the  results  obtained,  and  also  the  percentages 
of  moisture  and  ash  present  in  the  samples : 
