6 
Rhizoinc  of  Iris  Versicolor. 
(  Am.  Jour.  Pharm. 
\    January,  1911. 
time,  deposited  a  brown,  amorphous  solid,  but  nothing  crystalline 
was  obtained  from  it. 
The  filtrate  from  the  basic  lead  acetate  precipitate,  after  removal 
of  the  excess  of  lead,  gave  a  slight  precipitate  with  potassium  mer- 
curic iodide,  and  when  heated  with  potassium  hydroxide  a  strong 
ammoniacal  odor  was  developed,  thus  indicating  the  probable  pres- 
ence of  soluble  protein  products.  It  readily  reduced  Fehling's  solu- 
tion, and  contained  a  large  amount  of  sugar,  which  yielded  <i-phenyl- 
glucosazone,  melting  and  decomposing  at  212°.  It  also  contained 
some  potassium  salts,  since  the  addition  of  an  aqueous  solution  of 
picric  acid  to  a  portion  of  the  liquid  caused  a  gradual  separation 
of  crystals  of  potassium  picrate.  The  main  portion  of  the  aqueous 
liquid  was  concentrated  to  the  consistency  of  a  syrup  and  kept  for 
a  considerable  time,  but  nothing  crystalline  was  deposited. 
The  Resins  (B). 
The  resinous  material  which  had  been  separated  from  the  original 
alcoholic  extract,  as  previously  described,  was  a  dark-colored,  soft 
solid,  and  amounted  to  694  grammes,  thus  representing  about  8.7 
per  cent,  of  the  weight  of  the  drug.  It  was  digested  with  hot  alco- 
hol, the  liquid  brought  on  to  purified  sawdust,  and  the  thoroughly 
dried  mixture  then  extracted  successively  in  a  large  Soxhlet  appa- 
ratus with  various  solvents.  The  amounts  of  the  respective  extracts, 
dried  at  100°,  were  as  follows: 
Petroleum  (b.  p.  35-50°)  extracted  296.0  Gms.  =  42.6  per  cent. 
Ether  "      226.0    "     =  32.6  "  " 
Chloroform  "        38.2    "     =   5.5   "  " 
Ethyl  acetate  "        16.4    "     =   2.4  "  " 
Alcohol  "        30.2    "     =  4.4  "  " 
Total  606.8  Gms.  =  87.5  per  cent. 
From  these  results  it  would  appear  that  a  portion  of  the  resin 
had  been  rendered  insoluble  during  the  process  of  extraction. 
Petroleum  Extract  of  the  Resin. 
The  petroleum  extract  of  the  resin  consisted  of  a  dark-colored, 
oily  product,  and  amounted  to  296  grammes.  It  was  dissolved  in 
a  large  volume  of  ether,  and  the  ethereal  liquid  shaken  with  aqueous 
