358  Aniseed  Oils,  and  Anethol.  {Amjuiy,ri9Po?arm' 
long.  Into  the  other  opening  insert  a  straight  glass  tube.  The 
apparatus  is  now  ready  tor  use.  Slightly  elevate  the  canister,  place 
a  receiver  under  the  long  rubber  tubing  and  start  the  siphon  by 
blowing  into  the  short  glass  tube.  The  canister  is  thus  quickly 
emptied  without  loss.  The  small  quantity  of  oil  remaining,  can 
readily  be  removed  by  draining. 
The  physical  properties  of  this  oil  are  about  the  same  as  those 
for  aniseed,  the  slight  variations  having  been  noted  above. 
The  composition  of  star  anise  oil  appears  to  be  somewhat  more 
complex  than  that  of  anise  oil. 
Many  adulterants  have  been  reported  by  the  various  investiga- 
tors, but  at  present  only  those  of  a  more  scientific  character  are  met. 
Kerosene  seems  to  have  been  used  largely  at  one  time,  but  the 
writers  never  met  with  any  in  this  oil.  It  might  be  interesting, 
however,  to  record  a  few  observations  made  with  this  adulterant. 
Schimmel's  Report,  April,  1897,  P-       contains  the  following  : 
Specific  Gravity   Congealing  Solubility  in  alcohol, 
at  150  C  Point. 
Pure  Oil  .  .   0-986     +  18°     C.  Soluble  in  2-2  and  more  parts 
Oil-f-  5  per  cent,  kerosene  0*978     +  16X0  C.  Not  soluble  in  10  parts 
"  +10  "    "         "        0-970    +i4^°C.  "       "        "  " 
J.  C.  Umney  reported  the  following  observations ;  Chem.  and 
Drug.,  Vol.  51  (1887),  p.  623  : 
Specific  Gravity       Congealing  Contained, 
at  150  C  Point. 
1  0*894  -f-   5'7°  C.  56  per  cent  of  Kerosene 
2  0*926  +  970  C.  37 
3  0-939  +n-5°C.  36 
4  0-920    •      +  8-8°  C.  41       "       "  " 
5  0-910  +  7'8°  C.  47 
The  above  data  were  obtained  from  star  anise  oil  of  the  London 
market. 
The  authors  have  recently  examined  a  number  of  samples  of  the 
various  aniseed  oils  offered  as  pure,  with  the  following  results : 
Source.  Specific  Gravity.  Optical  Congealing      Solubility  in 
Rotation.  Point.  equal  volume 
of  alcohol. 
1  Russian  ....  0-9838  at  170  C.       +  30    5o/  +  15°    C.  Soluble 
2  .  .  .  .  0-9893  "  200  C.       —40    59'  +  1 8°  C. 
3  Tonquin  .  .  .   0*9834  "  170  C.       —  i°    30/  +  170  C. 
4  Star  Anise  .  .   0-9648  "  170  C.       —  i°    27'  +  150  C. 
5  -  •   0-9870  "  170  C.       +  o°    58'  +  160  C. 
6  .   .   0-9822  "  170  C.       —i°    53'  +I5-5°C. 
7  •  •  0-9821  "  170  C.       —i°    3ir  +  14-5°  C. 
8  .  .   0-9832  "  170  C.     .  — 1°    447  +  14°  C. 
9  .  .   0-9832  "  170  C.       —  i°    447  4-  14°  C. 
