Am.  Jour.  Pharm.\ 
July,  1898.  ) 
A  Species  of  Commelina. 
325 
ing,  and  after  heating  some  of  the  plain  filtrate  with  acid  and  again 
applying  Fehling's  solution,  an  increased  reduction  of  the  latter  took 
place. 
Mayer's  reagent  gave  a  very  slight  cloud. 
Potassium  tri-iodide  gave  still  less  cloud. 
A  portion  of  the  solution  which  gave  these  reactions  was  acidi- 
fied with  diluted  sulphuric  acid,  placed  in  a  separating  funnel,  and 
Fig.  3. 
agitated  with  two  successive  portions  of  petroleum  benzin,  and  after- 
ward with  two  portions  each  of  ether  and  chloroform.  The  two 
lots  of  each  solvent  were  mixed,  after  being  separated  from  the 
watery  layer,  and  allowed  to  spontaneously  evaporate.  A  reddish 
residue  was  left  upon  evaporation  of  the  benzin.  It  was  soluble  in 
water ;  the  solution  possessed  no  reducing  power  on  gold  and  silver 
salts,  but  it  showed  a  reducing  action  on  Fehling's  solution,  and, 
