258 
American  Pharmacopceia, 
A.111.  Jour.  Pharm. 
June,  1906. 
aB  25 °  not  above  -f  io°;  soluble  in  every  proportion  in  alcohol 
and  in  3  volumes  70  per  cent,  alcohol ;  free  from  phellandrene. 
Eugenol. — Colorless  or  faintly  yellow;  d25o  1-072  to  10741 ;  aD 
zt  0°  ;  boiling  point  251  to  25 30  ;  soluble  in  every  proportion  in 
alcohol,  and  in  2  parts  70  per  cent,  alcohol. 
Fennel  Oil  [Oleum  fceniculi). — Colorless  or  faintly  yellow ;  d25° 
0*953  t0  0-973  ;  solidification  point  not  below  +  5°  ;2  soluble  in  an 
equal  volume  alcohol,  likewise  in  10  volumes  or  less  80  per  cent, 
alcohol. 
Oil  of  Hedeoma  or  American  Pennyroyal  [Oleum  hedeomce). 
— Faintly  yellow;  d25o  0-925  toO'935  ;  aB  250  from  about  -f  18  to 
-f  220  ;  soluble  in  2  and  more  vols.  70  per  cent,  alcohol. 
Oil  of  Juniper  Berries  (Oleum  juniperi).— Colorless,  faintly 
green  or  yellow;  d25o  o-86o  too  880  ;3  soluble  in  10  volumes  90  per 
cent,  alcohol.4. 
Lavender  Oil  {Oleum  lavandulce  flormn). — Colorless  or  yellow  ; 
d25o  0  880  to  0-892  ;5  soluble  in  3  vol.  70  per  cent,  alcohol. 
Lemon  Oil  {Oleum  limoms) — Faintly  yellow,  citral-content  not 
less  than  4  per  cent.;6  d25o  0-851  to  0855;    am-o  not  below  + 
1  These  figures  apply  to  150  ;  at  250  the  specific  gravity  lies  between  1*064 
and  1*067  (comp.  table). 
2  Solidification  must  in  case  of  need  be  introduced  by  inoculation  with  a 
small  crystal  of  anethol.  The  lowest  limit  of  the  solidification  point  might 
suitably  be  -f  -  40,  as  in  commercial  products  it  is  usually  found  between  +  4  and 
4-6°. 
3  Oil  of  juniper  berries  is  also  frequently  lighter  ;  a  lowest  limit  of  0*854 
would  be  more  suitable  (comp.  table). 
4  The  specification  of  solubility  is  mostly  only  answered  by  quite  fresh  dis- 
tillates ;  even  when  kept  in  a  rational  manner  the  solubility  of  oil  of  juniper 
berries  diminishes  rapidly. 
5  The  lower  limit  of  the  specific  gravity  is  not  correct  ;  it  should  read  :  0*875 
(comp.  table). 
6  The  citral-determination  is  made  by  Sadtler's  method  (comp.  Reports, 
April,  1904,  47,  and  October,  1904,  119)  with  this  extension,  that  in  addition  to 
the  actual  test  also  a  "  blind  "  test  without  oil  is  made  ;  this  is  no  doubt  a  decided 
step  in  advance  as  in  this  manner  the  end  of  the  reaction  can  be  observed  or 
approximated  somewhat  better,  but  in  the  tests  made  by  us  we  have  again  come 
to  the  conclusion  that  a  really  exact  determination  is  not  possible  even  in  this 
manner,  and  for  this  reason  we  must  continue,  as  before,  to  characterize  the 
method  as  unreliable. 
