AmMay?iF93arm'}      Researches  on  Opium  Alkaloids.  237 
The  following  analyses1  were  made,  pointing   to  the  formula 
C37H36N209 : 
(1)  -322  grm.  gave  -8025  grm.  C02  and  -1655  Srm-  H20. 
(2)  -2 1 8  grm.  gave  -5395  grm.  C02  and  -1120  grm.  H20. 
(3)  -214  grm.  gave  *5328  grm.  C02  and  -  no  grm.  H20. 
(4)  -3705  grm.  gave  -9215  grm.  C02  and  -1815  grm.  H20. 
(5)  -467  grm.  gave  167  cc.  N;  B  =  758-5  mm.;  t  =  8°  ;  or 
-0201235  grm.  N. 
(6)  -6135  grm-  gave  22'8  cc.  N ;  B  ==  745  mm.;  t  =  12-5° ;  or 
-026408  grm.  N. 
The  substance  used  for  Nos.  1,  2  and  5  was  identical ;  for  3  and  6 
recrystallized,  all  dried  over  vitriol.  The  substance  used  for  No.  4 
was  previously  heated  to  1500  C. 
XANTHALINE. 
Calculated  for 
C37H36N209  -  C36H36N.209 
C,   68*io  67*50 
H,   5"52  5*62 
N,    4*29  4'33 
O,   22*09  22-50 
100 '00         100 -oo 
Found. 
1  23  456 
67-97     67-50    67-90     67-83     —  — 
57i     57i     57i     5*44    —  — 
—       —       —       —     4-31  4-31 
Hydrochlorate  of  Xanthaline. — As  mentioned  above,  xanthaline 
dissolves  freely  in  dilute  warm  hydrochloric  acid,  and  separates 
from  the  bright  yellow  solution  on  cooling,  in  voluminous  yellow 
needles  which,  after  withdrawing  the  liquid,  should  be  washed  with 
a  little  cold  strong  spirit  and  dried  at  a  very  gentle  heat.  This  salt 
is  perfectly  stable,  but  loses  weight  over  vitriol.  If  heated  for 
some  hours  to  about  1 500  C,  the  pure  base,  free  from  chlorine,  is 
left.  In  order  to  prove  the  correctness  of  the  formula  deducted 
from  the  analyses  of  the  base,  the  hydrochlorate  was  likewise 
analyzed. 
(1)  -254  grm.  burned  with  chromate  of  lead  and  metallic  copper 
gave  -519  grm.  C02  and  -1355  grm.  H20. 
(2)  -548  grm.  gave  -2015  grm.  AgCl  or -0498  CI. 
1  The  elementary  analyses  cited  in  this  paper  were  kindly  carried  out  by 
Professor  Hermann  Ost,  of  Hanover,  then  at  Leipzig. 
