io8  Oreodaphne  Californica.  {'^"'fc"  x^sys'""' 
color  and  a  more  agreeable  odor,  but  retaining  its  previous  pungency. 
All  the  oil  which  came  over  under,  but  not  to  exceed  175°  C,  was 
reserved  for  the  separation  of  the  hydrocarbon,  while  that  between  175° 
and  220°  C.  was  used  for  the  separation  of  the  oxygenated  oil.  The 
fractions  having  the  lower  boiling-point  were  rectified  in  an  atmosphere 
of  hydrogen  over  caustic  potassa  and  over  soda  lime,  both  processes 
yielding  identical  results — the  distillates  being  obtained  absolutely  free 
from  oxygen  when  rectified  over  iodium.  The  portion  with  the  higher 
boiling-point,  distilled  completely  between  180°  and  210°  C,  and  was 
collected  in  three  fractions,  each  of  which  commenced  to  boil  between 
205°  and  210°  C.  when  heated  separately. 
Hydrocarbon. — The  pure  hydrocarbon  is  a  colorless,  limpid  liquid, 
possessing  an  agreeable  aromatic  odor,  bearing  some  resemblance  to  a 
mixture  of  camphor  and  oil  of  nutmegs.  Its  taste  is  like  that  of  car- 
damom. Its  specific  gravity  is  '894  at  15*5°  C,  and  its  boiling-point 
is  175°  C.  It  is  very  volatile  and  highly  inflammable,  burning  with  a 
brilliant,  slightly  smoky  flame.  It  is  nearly  insoluble  in  water  ;  soluble 
in  about  five  parts  by  volume  of  95  per  cent,  alcohol.  It  dissolves 
iodine  slowly,  acquiring  a  deep  red  color.  Nitric  acid,  added  to  it  and 
heated,  causes  a  violent  reaction,  with  the  disengagement  of  nitrous  acid 
fumes,  the  production  of  a  yellow  color,  and  the  disappearance  of  the 
odor  of  the  hydrocarbon.  Nitrous  acid  occasioned  a  rapid  and  violent 
reaction,  with  the  production  of  heat.  When  heated  with  sulphuric 
acid,  a  thick,  reddish  mixture  was  obtained,  becoming  black,  and  dis- 
engaging sulphurous  acid  gas. 
Oreodaphnol. — This  is  the  oxygenated  portion  of  the  crude  oil,  and 
was  obtained  between  175°  and  220°  C.  It  is  an  oily  liquid,  of  a 
light  straw  color,  and  of  a  pungent  and  penetrating  odor.  Its  taste  is 
hot  and  camphorous  ;  its  specific  gravity  "960.  It  is  very  inflammable, 
burning  with  a  bright  flame,  giving  off  pungent  vapors,  and  leaving  a 
carbonaceous  residue.  Its  boiling-point  is  210°  C.  It  dissolves  iodine, 
with  the  generation  of  a  slight  heat,  and  the  production  of  a  reddish- 
brown  solution.  When  treated  with  sulphuric  acid  a  reaction  was 
observed,  accompanied  with  increase  of  temperature  and  the  disengage- 
ment of  sulphurous  acid.  Nitric  acid  exerted  no  action  in  the  cold, 
but  when  heated,  a  violent  reaction  resulted,  and  nitrous  acid  fumes 
were  given  off.    Treated  with  sodium,  a  reaction  was  observed. 
Oreodaphnene. — Oreodaphnene  is  generated  when  oreodaphnol  is  dis- 
tilled with  glacial  phosphoric  acid,  in  an  atmosphere  of  dry  hydrogen 
