Am.  Jour.  Pharm. 
June,  1921. 
Pelargonium  Oil. 
379 
pp.  36-41),  that  rhodinol,  roseol  and  reuniol  had  in  common  the  pos- 
session of  geraniol,  to  which  was  added  a  second  alcohol,  which 
later  was  determined  by  Wallach  (Central  Blatt,  1896,  I,  p.  809)  as 
citronellol.  As  to  the  question  whether  the  name  of  citronellol  or 
rhodinol  had  the  right  of  priority,  there  have  been  many  disputes. 
The  name  of  rhodinol  had  been  claimed  also  for  geraniol  by  Erd- 
mann  and  Huth  (see  above)  ;  then  by  Poleck  (Journ.  prakt.  Chem., 
Ser.  II,  LVI,  1897,  pp.  515-519).  The  question  had  also  been  de- 
cided by  Bertram  and  Gildemeister  (Journ.  prakt.  Chem.,  Ser.  II, 
LVI,  1897,  pp.  506-514).  The  difficulties  connected  with  the  solu-, 
tion  of  this  question  may  be  seen  from  the  following  account  of  the 
two  chemists  cited.  Rhodinol  Eckart  is  a  compound  of  from  20  to 
25  per  cent,  of  citronellol  with  from  75  to  80  per  cent,  of  gera- 
niol; rhodinol  Barbier  and  Bouveault  is  identical  with  citronellol 
C10H2oO ;  rhodinol  Erdmann  and  Huth  is  identical  with  geraniol 
Ci0H18O ;  rhodinol  Tiemann  and  Schmidt  corresponds  to  1-citro- 
nellol.  Compare  besides  Bertram  and  Gildemeister  (Journ.  prakt. 
Chem.,  Ser.  II,  LIII,  1896,  pp.  225-237),  and  Hesse  {ibid.,  pp.  238- 
241). 
The  geraniol  was  found  up  to  now  chiefly  in  the  following  oils : 
essence  of  acacia-blossoms  (Schimmel,  Ber.,  1903,  II,  p.  15)  ;  es- 
sence of  champaca-blossoms,  prepared  from  Michelia  species 
(Schimmel,  Ber.,  1907,  II,  p.  18)  ;  citronellol-oil,  from  Andropogon 
nardus  L.  (Schimmel,  Ber.,  1893,  II,  p.  12)  ;  citron-petitgrain-oil, 
from  Citrus  limonum  Risso  (Schimmel,  Ber.,  1905,  I,  p.  63)  ;  euca- 
lyptus-oil, from  Eucalyptus  macarthuri  H.  D.  et  J.  H.  M.  (Schim- 
mel, Ber.,  1907,  II,  p.  36),  from  Eucalyptus  maculata  Hook.  (Schim- 
mel, Ber.,  1893,  II,  App.  18),  from  Eucalyptus  maculata  var.  citrio- 
dora  Hook.  (Schimmel,  Ber.,  1890,  p.  20,  App.  18)  ;  geranium-oil 
(Gintl,  Jahresber.  Chem.,  1879,  p.  941);  gingergrass-oil,  from  An- 
dropogon spec.  (Schimmel,  Ber.,  1904,  I,  p.  52)  ;  lavender-oil 
(Schimmel,  Ber.,  1904,  I,  p.  131);  lemongrass-oil,  from  Andropo- 
gon citratus  D.  C.  (Schimmel,  Ber.,  1894,  II,  p.  32)  ;  linaloa-oil,  from  \ 
Bursera  and  Ocotea  spec.  (Schimmel,  Ber.,  1904,  I,  p.  131)  ;ineroli- 
oil,  from  Citrus  bigaradia  Risso  (Tiemann  and  Semmler,  Ber.  chem. 
Ges.,  XXVI,  1893,  p.  271);  orange-petitgrain-oil,  from  Citrus  au- 
rantium  Risso  (Roure-Bertrand  Fils,  Ber.,  1904,  II,  p.  35)  ;  palma- 
rosa-oil,  from  Cymbogon  Martini  Stapf  (Jacobsen,  Ann.  d.  Chem., 
