Amji°y>r,x8>79?rm }  Paricine  and  Aricine.  373 
solution  once  more  mixed  with  a  little  light  petroleum  spirit,  by  which, 
as  a  rule,  some  dark-colored  alkaloid  is  still  separated.  The  resulting 
ethereal  solution  is  again  dropped  into  pure  light  petroleum  spirit,  when 
the  alkaloid  is  obtained  pure,  and  only  has  to  be  collected. 
My  attempts  to  separate  the  brown  resinous  substance  following  the 
paricine  into  solution,  by  means  of  animal  charcoal,  turned  out  com- 
pletely unfavorable,  because  the  animal  charcoal  not  only  takes  up  this 
substance,  which  is  a  decomposition  product  of  paricine,  but  also  the 
paricine  itself. 
The  paricine  obtained  in  the  above  manner  is  a  light,  pale-yellow 
anhydrous  powder  which  melts  at  I36°C.  It  dissolves  readily  in  ether, 
(true  benzin,  alcohol,  acetone  and  chloroform,  but  is  nearly  insoluble  in 
pure  petroleum  spirit,  as  well  as  in  water. 
Its  composition  corresponds  with  the  formula  C16H18N20.  It  gave 
upon  analysis  as  follows  : 
I.  0*2778  gram,  dried  at  ioo°C,  gave  0770  C02  and  0.1765  H20. 
II.  0*2538  gram,  dried  at  ioo°C,  gave  07045  0O2  and  0*1625  H20. 
III.  0-2540  gram,  dried  at  I05°C,  gave  0*7000  C02  and  0*1595 
H20. 
IV.  0*2769  gram,  dried  at  ioo°C,  gave  0*029737  N. 
The  formula  C,fiHlgN20  Found. 
requires.  I.  II.  III.  IV. 
CM  19*  75'59  75*6°  757o  7S'*S  — 
H18  18  708  7-08  7-11  6-98  — 
N2  28  ii-oz  —  —  —  10-83 
O  16  6-31  —  —  —  — 
The  material  used  in  analysis  III.  had  been  precipitated  from  an 
acetic  acid  solution,  then  dried  in  the  air  and  finally  at  I05°C.  0*2623 
gram  of  the  air-dried  substance  gave  at  this  temperature  0'Oo8  H20— 3 
per  cent.  The  formula  C16H18N20-f-JH2O  requires  3*4  per  cent. 
H20. 
The  alcoholic  solution,  which  as  well  as  the  other  solutions  of  pari- 
cine is  yellow  colored,  shows,  with  />=l,  no  action  upon  the  beam  of 
polarized  light.  The  alcohol  used  was  97  per  cent.  This  solution 
had  a  bitter  taste  and  a  weak  basic  reaction. 
Paricine,  however,  is  not  capable  of  neutralizing  strong  acids,  as,  for 
instance,  sulphuric  or  hydrochloric  acid.  With  many  acids  it  forms 
amorphous  salts,  difficultly  soluble  in  excess  of  the  acid,  to  which  1 
shall  refer  subsequently  in  another  place. 
