Am'ju°ner;i906?rm'}  American  Pharmacopoeia.  257 
Cinnamic  aldehyde  (CinnaldeJiydum). —  Colorless;1  containing 
at  least  95  per  cent,  pure  cinnamic  aldehyde;  d25o  about  1-047  ? 
aD  ±  o°;  boils  about  2500  with  decomposition  ;  solidifies  in  a 
freezing  mixture  and  melts  again  at  —  7-5°  ;  soluble  in  every  pro- 
portion in  alcohol. 
Clove  Oil  (Oleum  caryophylli). — Colorless  or  pale  yellow  ;  euge- 
nol-content  at  least  80  per  cent,  by  volume;  d25o  1-040  to  ro6o  ;3 
soluble  in  an  equal  volume  alcohol,  and  in  about  2  volumes  70  per 
cent,  alcohol. 
Copaiba  Oil  (Oleum  copaibce). — Colorless  or  pale  yellow,  d25o  0  895 
to  0-905  ;4  aD  to  the  left ;  soluble  in  2  vol.  alcohol.5 
Coriander  Oil  (Oleum  coriaudri). — Colorless  or  faintly  yellow  • 
d25o  0*863  to  0-878;  am.0o  -J-  7  to  -j-  140  ;  soluble  in  3  volumes 
70  per  cent,  alcohol  ;  in  80  and  90  per  cent,  alcohol  soluble  in  every 
proportion. 
Oil  of  Cubebs  (Oleum  cubebce). — Colorless,  pale  green,  or  yellow; 
d25o  0-905  to  0-925  ;  am5o  —  25  to  —  400. 
Erigeron  Oil  (Oleum  crigerontis). — Faintly  yellow  ;  d25o  0-845  to 
0  865  ;  am5o  about  -f-  500  ;  soluble  in  an  equal  volume  alcohol. 
Eucalyptol. — Colorless;  d25o  0*925  f  aB  ±  0°  ;  boiling  point 
176  to  1 770;  solidifies  on  cooling  into  needle-shaped  crystals,  which 
melt  at  —  1°  ;7  soluble  in  every  proportion  in  alcohol. 
Eucalyptus  Oil  (Oleum  eucalypti). — Colorless  or  faintly  yellow  ;8 
cineol-content  at  least  50  per  cent,  by  volume  ;9  d25o  0*905  to  o  925  ; 
1  Cinnamic  aldehyde  is  not  colorless,  but  bright  yellow. 
2  The  statement  of  the  specific  gravity  is  not  correct,  it  should  readd25°  1*048 
to  1-52  (comp.  table). 
3  As  oils  with  a  eugenol-content  down  to  80  per  cent,  are  admitted,  the  lower 
limit  of  the  specific  gravity  should  be  reduced  to  1*033  (comp.  table). 
4  The  specific  gravity  at  150  amounts  to  up  to  0*918,  as  we  have  recently 
observed  with  one  of  our  own  distillates  (comp.  Report  April,  i905»  25).  The 
specific  gravity  mentioned  corresponds  to  the  value  0-915  at  250  (see  table). 
5  On  the  strength  of  observations  with  authentic  material  we  are  in  a  position 
to  state  that  1  vol.  copaiba  oil  requires  5  to  10  vol.  95  per  cent,  alcohol  to  form 
a  solution.    See  Report,  April,  1905,  25. 
6  The  specific  gravity  at  250  is  not  0-925,  but  fluctuates  between  0*921  and 
0-923  (comp.  table). 
7  Solidification  has  to  be  started  in  case  of  need  by  rubbing  a  glass  rod  on 
the  wall  of  the  vessel. 
8  The  oil  has  occasionally  also  a  greenish  shade. 
9  With  regard  to  the  ciueol-estimation,  compare  what  has  been  said  under 
cajeput  oil. 
