THE  AMERICAN 
JOURNAL  OF  PHARMACY 
■   ^SS^K 
FEBRUARY,  iS9f.    FtB  5  l8^vJ 
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ANALYSIS  OF  PYCNANTHEMUM  LAN CEOL ATOM, 
AND  NOTES  ON  ITS  ETHEREAL  OIL. 
By  Harold  C.  Barker. 
Contribution  from  the  Chemical  Laboratory  of  the  Philadelphia  College  of  Pharmacy. 
No.  129. 
This  analysis  was  made  in  the  Chemical  Laboratory  of  the 
Philadelphia  College  of  Pharmacy,  at  the  request  of  Prof.  Henry 
Trimble,  to  whom  the  writer  is  indebted  for  many  suggestions,  as 
well  as  a  continual  supervision  of  the  work.  No  published  analysis 
of  this  plant  has  been  found  by  the  writer,  but  an  examination  of 
P.  linifolium,  a  nearly  allied  species,  was  made  by  Dr.  Charles  Mohr, 
in  the  year  1876,  the  results  of  which  were  published  in  the  Pro- 
ceedings of  the  American  Pharmaceutical  Association,  Vol.  24,  p. 
513. 
The  material  used  in  the  present  analysis  was  collected  in  Dela- 
ware County,  Pa.,  during  the  latter  part  of  July  and  the  earlier  part 
of  August,  1893,  when  the  plant  was  in  flower.  In  collecting,  the 
plants  were  cut  off  a  few  inches  above  the  ground. 
The  material  was  allowed  to  dry  without  exposure  to  sunlight  or 
artificial  heat,  it  thereby  losing  about  60  per  cent,  of  its  weight. 
For  analysis,  a  sample  was  reduced  to  fine  powder,  of  which  50 
grammes  were  taken. 
(65) 
