332  Cascara  Amarga.  { Am iST"1, 
Soluble  in  water :  K,  Na,  sulphate,  carbonate   1*10 
Soluble  in  dilute  hydrochloric  acid  ;  Aluminum,  iron,  phosphates  and 
carbonates   2*89 
Insoluble  in  sodium  hydrate  ;  sand   '56 
Total   4-55 
Several  portions  of  drug  were  treated  with  benzol,  alcohol  and  water  : 
Amount  extracted  with  benzol   2  72  per  ct. 
"  "  "    alcohol  (-889  at  60°)   lO'OO  " 
11  "  "    cold  water   4-16  44 
The  benzol  residue  was  dried  at  a  low  temperature,  that  at  110°  C. 
removing  volatile  oils  and  traces  of  moisture.  This  residue  was 
treated  with  several  portions  of  warmed  acidulated  water,  this  solution 
giving  reactions  for  an  alkaloid,  with  tannic  acid,  Mayer's  reagent  and 
other  test-reagents.  Residue  was  treated  with  eighty  per  cent,  alcohol 
(sp.  gr.  848  at  60°)  dissolving  resins  leaving  a  residue  of  fixed  oils, 
resins  and  .wax. 
The  following  table  gives  the  systematic  course  of  analysis: 
Benzol  extract  contains  :  Volatile  oils  driven  off  at  110°  C   "50  per  ct. 
Soluble  in  acid  water,  reactions  for  alkaloids   *22  " 
Soluble  in  alcohol  ('848),  resins   -40  " 
Insoluble  in  alcohol,  wax,  resins,  etc   1'06  " 
Total. 
Eight\^  per  cent,  alcohol  extract  contains  : 
Extractive  matter   12*65  per  ct. 
Inorganic  ash   "4  " 
Matter  soluble  in  water   9*00  " 
Ash     "     "       "   ....     -50  " 
Matter  sparingly  soluble,  amorphous   '55  " 
The  dried  alcoholic  extract  treated  with  several  portions  of  absolute 
alcohol  ('7938  at  60°)  evaporated  to  a  dry  extract  contains : 
Matter  soluble  in  water,  including   ,      6'34  per  ct. 
Tannin,  organic  acids,  some  extractives  preci- 
pitated with  lead  sub -acetate   1-66  per  ct. 
Lead  removed  from  solution  with  H2S  nitrate 
gave  reactions  for  alkaloid  with  test  reagents.  4*68  " 
Insoluble  in  water   1*25  " 
Soluble  in  dilute  ammonia  hydrate,  acid  resins.  41  " 
Insoluble  in  ammonia  hydrate,  neutral  resins.    '84  11 
