Am.  Jour.  Pharm.  ) 
March,  1915.  J 
Cineol  in  Oil  of  Eucalyptus. 
IOI 
Professor  Newcomb's  experiments  developed  no  tendency  in  the 
biennial  hyoscyami  to  become  annual  or  vice  versa,  which  is  in  accord- 
ance with  my  own  observations  covering  a  period  of  several  years. 
These  species  might,  therefore,  be  better  understood  if  the  annual 
and  biennial  forms  are  maintained  as  distinct  species.  Under  these 
conditions,  Hyoscyamus  niger  Lin.  will  be  restricted  to  the  large, 
branched,  biennial  plant  having  yellow  flowers,  with  violet,  purple, 
or  brownish-green  veins.  The  annual  plant,  with  similarly  colored 
flowers,  but  with  a  slender,  generally  unbranched  stem,  will  then 
be  known  as  H.  Bohemicus  F.  W.  Schmidt,  of  which  the  yellow- 
flowered  H.  pallid  us  Wald.  and  Kit.  becomes  a  color  variety. 
The  proper  names  and  leading  synonyms  are  as  follows : 
Hyoscyamus  xiger  Lin.  Sp.  PI.  179,  1753.  Probably  belonging 
here  are : 
H.  oMcinarum  Crantz  Inst.  2,  325,  1766. 
H.  lethalis  Salisb.  Prod.  131,  1796. 
Hyoscyamus  Bohemicus  F.-W.  Schmidt,  Fl.  Bohem.  3,  31,  1795. 
H.  Verviensis  Lejune,  Fl.  de  Spa.  1,  116.  181 1. 
H.  agrestis  Kit.  in  Schult.  CEster.  Fl.  Ed.  2,  1,  383,  1S14. 
H.  pictus  Roth  Nov.  PI.  Sp.  119.  1821. 
H.  niger  Lin.  var.  annua  Sims.  Bot.  Mag.  t.  2394,  1823. 
H.  niger  Lin.  var.  agrestis  Nees  ab  Es.  Trans.  Lin.  Soc.  17. 
77,  i837- 
Hyoscyamus  Bohemicus  Schmidt  var:  pallidus  (Wald.  and 
Kit.)  N.  Comb. 
H.  pallidus  Wald.  and  Kit.  Plant.  Rar.  Hung,  ex  Willd. 
Enum.  Hort.  Berol.  227,  1809. 
H.  niger  Lin.  var.  pallidus  Koch  Syn.  509,  1837. 
ESTIMATION  OF  CIXEOL  IN  OIL  OF  EUCALYPTUS.1 
By  Joseph  L.  Turner  and  Ralph  C.  Holmes. 
The  question  of  an  accurate  determination  of  the  quantity  of 
cineol  in  oil  of  euclayptus  is  still  unsettled,  notwithstanding  the 
quite  considerable  amount  of  research  which  has  been  devoted  to  it, 
and,  judging  from  its  present  status,  it  will  not  be  settled  for  some 
time  to  come.  This  is  to  be  regretted  the  more  since  it  is  now 
established  beyond  dispute  that  the  value  and  therapeutic  action  of 
1  Read  at  the  November  meeting  of  the  New  York  Branch  of  the  American 
Pharmaceutical  Association. 
