Am.  Jour.  Pharm.) 
September,  1907.  J 
New  Essential  Oils. 
433 
A  second  sample  of  oil  from  the  same  species,  which  we  received 
a  short  time  ago,  had  also  the  characteristic  parsley-like  odor  of 
the  former  oil,  but  differed  considerably  from  the  latter  in  respect  of 
specific  gravity  and  rotation,  and  showed  in  'these  properties  a 
remarkable  agreement  with  the  oil  of  Evodia  simplex}  The  con- 
stants were  as  follows:  d15°  0-9708;  aD  —  ig°  20' ;  acid  No.  i-i  ; 
ester  No.  8-7  ;  ester  No.  after  acetylation  33-0.  The  solubility  of  this 
oil  was  also  better  than  that  of  the  one  received  before,  as  it  dis- 
solved in  every  proportion  in  90  per  cent,  alcohol ;  when  highly 
diluted  (1  :  10)  a  faint  opalescence  occurred.  With  10  vol.  80  per 
cent,  alcohol  it  did  not  form  a  clear  solution. 
Whether  these  differences  between  the  two  oils  must  be  attributed 
to  various  methods  of  distillation,  or  to  different  stages  of  develop- 
ment of  the  plants  due  to  the  time  of  the  year,  we  are  unable  to  say. 
Along  with  the  oil  just  discussed  we  also  received  another  sample 
of  the  pilea  oil  already  described  in  detail  in  our  last  Report.2  The 
oil  now  received  showed  a  greenish  tinge,  and  had  a  considerably 
higher  rotation,  aD  -f-  5 8°  20' ;  for  the  rest  it  agreed  with  the  pre- 
vious oil;  d15°  0  8520;  nD20°  1-46902;  acid  No.  o ;  ester  No.  77; 
ester  No.  after  acetylation  34*4;  soluble  in  3-8  and  more  vol.  90  per 
cent,  alcohol. 
From  the  buds  of  the  Black  Currant  (Rides  nigrum  L.),  which 
had  been  sent  to  us  from  Russia,  we  obtained  in  a  yield  of  0-75  per 
cent,  an  essential  oil  of  the  following  constants  :  d15°  0-8741  ;  aD  -}- 
2°  3Q/ ;  nD2o°  1*48585  ;  acid  No.  o;  ester  No.  5  6;  soluble  in  6-5  and 
more  vol.  90  per  cent,  alcohol  with  slight  cloudiness,  which  dis- 
appears on  greater  dilution  (1  :  10).  The  oil  had  a  pale  greenish 
color  and,  judging  from  the  odor,  appeared  to  contain  among  others 
cymene.  As  we  only  had  a  few  grammes  of  oil  at  our  disposal,  we 
must  content  ourselves  with  the  enumeration  of  the  foregoing  data, 
Ayapana  Oil.  The  oil  of  Eupatorium  tviplinerve  Vahl  (E. 
Ayapana  Vent),  a  composite  indigenous  to  equatorial  Africa,  which 
in  other  tropical  districts  is  often  growing  wild,  but  in  the  East 
Indies  is  cultivated  as  a  tea-plant,  was  sent  to  us  from  Mayotte,  one 
of  the  Comoro  Islands,  in  the  Straits  of  Mozambique,  under  the 
name  of  "  essence  d'ayapana." 
The  oil  has  a  pale-green  color  and  a  peculiar  odor ;  d15°  0-9808 ; 
«d  +  3°  IQ/  5  ester  No.  8-o  ;  ester  No.  after  acetylation  23-4.  It 
1  Comp.  Report,  October,  1906,  82. 
2  Report,  October,  1906,  83. 
