130 
ON  CORIANDER  OIL. 
in  an  unchanged  state  with  a  hydrocarbon  which  has  lost  its 
muriatic  acid.    Analysis  gave — 
Carbon  ....  73-39  SO  ==  73-45 
Hydrogen  .  .  .  1036  67  10-25 
Chlorine        ...  3  16-30 
Cso  H6T  Cp=  Cso  H*4+3C1H.  This  formula  may  be  split  in  the 
following  manner:  3(C20  H16,  ClH)-hC20  HlG. 
According  to  this,  the  essential  oil  of  ginger  belongs  to  the 
same  class  of  essential  oils  as  the  coriander  oil.  The  ginger 
employed  so  plentifully  as  an  aromatic  in  cookery  must  there- 
fore also  belong  to  the  camphene  group  of  aromatics. — Land. 
Chem.  Gazette,  from  Sitzungsb.  der  Alcad.  der  Wissenseh.  za 
Wien.  July,  1852. 
ON  CORIANDER  OIL. 
By  A.  Kawalier. 
The  fruit  of  Qoriandrum  sativum  was  pounded  and  subjected 
to  distillation  with  water.  The  oil  which  swims  on  the  water 
which  distils  over  is  yellowish,  nearly  colorless,  and  possesses 
the  odor  and  taste  of  coriander  in  a  high  degree.  In  a  very 
diluted  state  the  odor  of  this  oil  resembles  that  of  orange  blos- 
soms. Its  specific  gravity  at  57°  F.  is  0-871,  its  boiling  point 
302°  F.  In  ascertaining  the  composition  of  this  oil,  for  the  first 
and  second  experiments  it  was  allowed  to  stand  over  chloride  of 
calcium  ;  for  the  third,  a  large  quantity  of  the  oil  was  exposed 
in  a  retort  on  the  oil  bath  to  a  temperature  below  its  boiling 
point.  The  portion  of  oil  which  came  over  last  was  employed 
for  the  analysis.  The  air  was  removed  from  the  distilling 
apparatus  during  the  investigations  by  means  of  carbonic  acid. 
The  analysis  gave — 
Carbon  .  .  .  .  77-62    78-01    77-73    10  ==  750-0  77-92 
Hydrogen    .  .  11-64    11-69    11-63      9       112  5  11-69 
Oxygen  ....  10-74    10-30    10-64     1        100  0  10-39 
The  formula  C10  H9  O  is  the  same  that  expresses  the  composi- 
tion of  Borneo  camphor.    Coriander  oil  is  therefore  to  be  con- 
sidered as  the  hydrate  of  an  oil  having  the  same  composition  as 
oil  of  turpentine,  C10  H90=  C10  H3-f-HO. 
