A%Jug.%8TOarm'}   Some  Constituents  of  Cornus  Florida.  391 
One  pound  of  the  well-dried  powder,  previously  exhausted  with 
water,  was  percolated  with  strong  alcohol,  and  yielded  a  tincture  of  a 
dark  color  and  somewhat  bitterish  and  astringent  taste.  It  was  detan- 
nated  by  hydrate  of  lead,  the  filtrate  freed  from  lead  by  sulphuretted 
hydrogen,  then  concentrated  by  distillation  and  allowed  to  evaporate 
spontaneously.  Yellowish  feathery  crystals  separated,  but  after  com- 
plete evaporation  a  deep  yellow  granular  resinous  mass,  of  a  slightly 
bitterish  taste,  was  left.  Washing  with  water  rendered  it  tasteless  and 
nearly  colorless  ;  it  was  freely  soluble  in  alcohol  and  ether,  and  on 
spontaneous  evaporation  was  left  in  an  amorphous  condition.  It  dis- 
solves partly  in  caustic  potassa,  the  dissolved  portion  being  reprecipi- 
tated  by  acids.  The  resin  is  fusible,  is  slightly  colored  by  cold  nitric 
acid,  oxidized  by  hot  nitric  acid,  not  dissolved  by  hydrochloric  acid> 
and  dissolves  in  cold  sulphuric  acid  with  an  orange  color,  becoming 
blackish  on  heating. 
The  powder  exhausted  by  water  and  alcohol  was  percolated  with 
benzin,  yielding  a  yellowish  liquid,  not  affected  by  perchloride  of  iron> 
and  on  evaporation  leaving  an  orange-yellow  fixed  oil,  of  a  bland  taste 
and  no  odor. 
The  experiments  on  the  bark  of  the  root  collected  in  April  were  as 
follows  : 
One  and  a  half  pound  of  the  ground  bark  was  macerated  and  perco- 
lated with  water.  The  percolate  was  of  a  much  deeper  red  color,  and 
of  a  more  bitter  and  astringent  taste  than  the  infusion  from  the  bark  of 
the  stem.  It  was  detannated  with  hydrate  and  oxide  of  lead,  and 
filtered  ;  the  filtrate  was  of  a  yellowish  color,  slightly  acid  and  very 
bitter,  and  on  evaporation  left  a  soft,  brownish  extract,  exceedingly 
bitter,  which  was  treated  with  strong  alcohol  until  the  residue  was  wholly 
or  almost  destitute  of  bitter  taste,  and  only  a  gummy  mass  remained. 
The  alcohol  solution  was  then  divided  into  two  portions.  One  was 
transferred  into  a  beaker  glass  and  left  to  evaporate  spontaneously, 
when  bitter  crystals  of  cornin^  with  some  coloring  matter,  were  deposited 
on  the  sides  of  the  vessel.  The  other  portion  was  precipitated  with 
subacetate  of  lead  and  filtered,  filtrate  freed  from  lead  by  passing  sul- 
phuretted hydrogen  through  it,  filtered,  and  evaporated  spontaneously, 
and  then  shaken  with  a  mixture  of  strong  alcohol  and  ether,  about  one 
part  to  seven,  to  separate  sugar  and  coloring  matter,  and  after  standing 
a  day  decanted  into  an  evaporating  dish  and  left  to  evaporate,  when 
