***jgHgS? rm"}  Buohu  and  Oil  of  Buohu. 
477 
yellow  oil  of  grateful  odor  and  constitutes  about  two-thirds  of  the 
volatile  oil.  It  has  a  pungent,  cool,  aromatic,  and  finally,  sweetish 
taste.  Desiccated  over  fused  calcium  chloride  and  then  distilled,  it 
fractions  very  irregularly.  The  first  fraction  (a)  very  small  in  quan- 
tity, came  over  at  from  180°  to  200°  C,  the  second  (6)  at  from  200° 
to  203°  C,  the  third,  the  largest  in  quantity,  at  from  203°  to  206°  C, 
the  fourth  (d)  at  from  206°  to  209°  C,  the  fifth  (e)  at  from  209°  to 
211°  C;  leaving  in  the  retort  a  small  yellowish-brown  residue.  Re- 
peating the  distillation,  after  having  reunited  the  more  abundant  frac- 
tions, there  was  obtained  a  portion  boiling  at  from  204°  to  206°  C. 
(not  corrected).  This  fraction  constitutes  a  perfectly  colorless,  mobile 
liquid,  lighter  than  water,  having  the  odor  and  taste  before  mentioned, 
and  when  subjected  to  ultimate  analysis,  gave  H  12*00  and  C  77*66  ; 
while  the  portion  boiling  at  from  209°  to  211°  C,  yielded  H  12*19 
and  C  77*48.  This  points  to  the  elementary  formula  C10H18O,  isomeric 
with  borneol,  which,  in  100  parts  contains  H  11*68  and  C  77*92. 
The  portion  boiling  at  from  204°  to  206°  C.  corresponds  better,  in  its 
results,  with  this  formula,  while  the  higher  boiling  fractions  probably 
contain  compounds  less  carburetted,  and  inversely. 
The  determination  of  the  vapor  density  was  made  by  Meyer's  method, 
upon  the  portion  boiling  at  from  204°  to  206°  C,  and  conduced  to  the 
formula  C10H18O,  but  the  substance  decomposed  at  the  temperature  at 
which  the  vapor  density  was  taken. 
The  Action  of  Sodium  upon  the  Elceopten  (Diosmelceopteri),  resulted 
in  the  formation  of  a  brownish  decomposition  product.  The  addition 
of  sodium  was  continued  until  decomposition  ceased  and  water  was 
then  added.  The  brown  semi-solid  decomposition  product  was  separ- 
ated from  the  liquid  by  filtration  through  wetted  paper.  The  filtrate 
was  agitated  with  ether,  then  treated  with  more  sodium,  and  acidulated 
with  hydrochloric  acid,  which  separated  an  oil  having  a  thymol-like 
odor.  It  was  extracted  with  ether,  and  the  solvent  evaporated  sponta- 
neously, when  it  distilled  at  from  225°  to  238°  C,  and  on  fractioning 
the  greater  part  boiled  at  from  230°  to  232°  C.  This  portion  consti- 
tutes a  light  yellowish  liquid,  very  dense,  of  the  odor  and  taste  of  thymol 
and  whose  aqueous  solution  (it  is  slightly  soluble  in  water)  does  not 
become  colored  on  the  addition  of  ferric  salts.  A  combustion  of  this 
substance,  gave  H  9*62  and  C  77*54,  which  points  to  the  formula 
C8H120,  having  in  100  parts  H  9*67  and  C  77*42.  The  determination 
of  the  vapor  density  by  Mayer's  process,  led  to  the  same  formula. 
