'•}      Volatile  Oil  of  Monarda  Punctata.  115 
was  DOW  redistilled  over  metallic  sodium ;  three  combustions  of  this 
distillate  were  made  with  results  as  follows  : 
Calculated  for     o  Hi  g. 
Found. 
2. 
3. 
C  88-23 
88-10 
88-35 
88-28 
H  11-77 
11-20 
11-30 
11-45 
100-00 
99-30 
99-65 
99-73 
The  above  results  would  show  the  presence  of  a  hydrocarbon  in  the 
oil,  corresponding  closely  to  C^o  H^g^  This  fraction  was  colorless,  sp. 
gr.  .856,  and  of  fragrant  odor.  The  formula  of  this  body  was  estab- 
lished by  taking  its  vapor  density,  which  will  be  given  below. 
Fraction  IV  (230°-245°)  after  redistillation  gave  a  very  large 
portion  distilling  at  230°-23.">°  C.  This  was  of  slight  yellow  color,, 
&p.  gr.  .968,  quite  viscid,  and  somewhat  minty  and  camphoraceous 
odor.  This  was  submitted  to  ultimate  analysis,  three  combustions 
giving  following  results  : 
Calculated  for  Ci  qH  i  ^  O.  Found. 
THYMOL. 
1. 
2. 
C  80-00 
79-75 
79-85 
80-05 
H  9-3a 
9-44 
9-32 
9-35 
0  10-67 
10-81 
10-83 
10  60 
The  above  corresponds  very  close  to  the  formula  CioH^^  O,  being 
that  of  thymol.  The  formula  of  this  body  was  also  calculated  from 
its  vapor  density. 
Sample  of  oil  No.  II  was  next  submitted  to  fractional  distillation^ 
similar  to  that  pursued  with  sample  No.  I.  The  oil  began  to  boil  at 
150°  C,  and  after  repeated  distillation  the  following  ten  fractions  were 
obtained  : 
I.  160°  to  175°  C— II.  175°  to  180°— IIL  180°  to  185°— lY. 
185°  to  195°— Y.  195°  to  210°— YL  210°  to  220°— YIL  220°  to 
233°— YIII.  230°  to  240°— IX.  240°  to  250°— X.  250°-f . 
Fractions  I,  YIII  and  IX  being  the  largest,  constituting  about  15 
per  cent.,  25  per  cent,  and  20  per  cent,  respectively,  were  therefore 
only  investigated.    The  fractions  obtained  between  180°  to  225°  C, 
