A™ctober,'i90Lm"}    American  Pharmaceutical  Association.  495 
Each  class  is  further  divided  into  nuclear  types,  consisting  ot 
cycles  of  three,  four,  five  or  six  carbon  atoms.  Such  a  system  will 
include  all  possible  compounds  of  the  formula  C15H24. 
The  second  part  of  the  paper  is  a  report  on  some  further  experi- 
mental work  with  the  sesquiterpenes. 
The  sesquiterpene  of  pepper  oil  has  been  identified  as  caryophyl- 
lene  by  preparing  the  characteristic  blue  nitrorite  of  this  hydro- 
carbon. 
The  sesquiterpene  of  ginger  oil  is  shown  to  be  a  new  compound, 
and  is  designated  as  zingiberene.  A  dihydrochloride,  a  nitron- 
chloride,  a  nitrorate  and  a  nitrorite  have  been  prepared. 
Some  further  derivatives  of  caryophyllene  were  also  reported  on. 
Comparative  Pharmacological  Study  of  Scopola  and 
Belladonna. 
By  Heny  H.  Rusby. 
This  paper  is  a  resume  of  this  subject  and  concludes  that  when 
administered  internally  scopola  is  more  depressing  and  toxic,  yet 
administered  externally  it  shows  almost  no  tendency  toward  absorp- 
tion to  the  extent  of  producing  systemic  effects,  but  does  act  locally 
with  promptness  and  efficiency  ;  in  eye  practice  more  promptly  and 
less  prolonged,  and  more  efficiently  in  all  the  other  ways  experi- 
mented with,  save  that  of  the  plasters,  where  it  is  slightly  less 
efficient  than  belladonna.  Finally,  scopola  exhibits  a  distinct 
superiority  over  belladonna  root  in  its  greater  uniformity  of  alka- 
loidal  percentages. 
Calcium  Oxalate  Crystals  in  the  Study  of  Vegetable  Drugs. 
By  Henry  Kraemer. 
The  author  gave  a  description  of  calcium  oxalate  crystals  in 
vegetable  drugs  and  considered  their  diagnostic  value.  (See  page 
471  of  this  Journal.) 
Oxygen  as  a  Standard  for  the  Gasometric  Tests  of  the 
Pharmacopceia. 
By  C.  G.  Hinrichs. 
The  author  has  made  careful  determinations  on  the  oxygen 
standard,  obtained  by  dissolving  a  weighed  amount  of  pure  crystal- 
