256 
ON  CHIMAPHILA  UMBELLATA. 
the  filter  a  considerable  amount  of  a  brownish-black  substance, 
which  was  tasteless,  insoluble  in  water,  but  soluble  in  alcohol 
and  in  alkaline  solutions. 
Peetic  Acid. — A  portion  of  the  leaves,  after  being  first  ex- 
hausted by  water  to  deprive  them  of  coloring  matter,  was  dis- 
placed with  a  solution  of  carbonate  of  soda,  when  muriatic  acid 
being  added  to  the  alkaline  solution  it  threw  down  a  gelatinous 
precipitate,  which,  after  drying  formed  laminae.  These  upon 
the  addition  of  water  swelled  considerably  but  remained  undis- 
solved. It  was,  however,  soluble  in  solution  of  potassa,  from 
which  it  was  again  precipitated  by  muriatic  acid. 
Resin. — A  tincture  was  made  with  alcohol  0.835  and  evapor- 
ated to  about  the  consistence  of  syrup,  and  then  thrown  into 
water,  which  precipitated  a  considerable  amount  of  resinous 
matter.  This  was  thrown  upon  a  filter,  and  washed  with  water 
and  then  with  ether.  This  resin  is  a  brownish-black  substance, 
which  is  inodorous,  hard,  brittle,  and  fusible.  It  is  insoluble  in 
water,  in  ether,  and  in  the  fixed  and  volatile  oils  ;  but  dissolves 
quite  freely  in  alcohol,  and  is  saponified  by  solution  of  potassa. 
Fatty  Matter. — The  leaves,  first  exhausted  with  alcohol  and 
then  treated  with  ether  and  evaporated,  left  a  small  quantity  of 
fatty  matter.  It  communicated  a  greasy  stain  to  paper,  which 
was  not  dissipated  by  heat.  It  was  soluble  in  the  volatile  and 
fixed  oils. 
Ohlorophylle. — Chlorophylle  was  seperated  by  treating  the 
ethereal  extract  with  hydrochloric  acid  and  precipitating  the 
acid  solution  with  water.  The  leaves  also  contain  a  yellow  color- 
ing matter,  soluble  in  water  and  alcohol. 
A  tincture  being  made  with  diluted  alcohol  and  agitated  with 
chloroform,  the  mixture  was  set  aside  for  some  time  until  the  li- 
quids separated.  The  lighter  solution  was  then  drawn  off,  and 
the  chloroformic  liquid  transferred  to  an  evaporating  dish  and 
allowed  to  evaporate  spontaneously,  yielded  a  yellow  crystalline 
•substance.  This  was  dissolved  in  alcohol,  filtered,  and  allowed 
to  evaporate  spontaneously.  By  this  means  the  crystals  were 
rendered  tolerably  pure. 
It  was  also  obtained  by  simply  distilling  the  stems  with  wa- 
ter. This  substance,  for  which  I  propose  the  name  of  Chima- 
philin,  comes  over  and  condenses  in  the  neck  of  the  retort,  in 
