42       IDENTITY  OF  SANGUINARINE  AND  CHELERITHRINE. 
nished  0.918  carbonic  acid  =  70.34  per  ct.  of  carbon  and  0.167 
water  —  5.21  per  ct.  of  hydrogen. 
The  direct  determination  of  nitrogen  gave  5.07  per  ct. 
0.3925  gramm.  of  the  double  salt  of  the  hydrochlorate  of 
ehelerithrine  and  chlorid  of  platinum:  thence  the  atomic 
weight  =  341-74. 
Accordingly  the  composition  of  Chelerithrine  is  : 
Carbon,  T  70.34 
Hydrogen,  -  5.21 
Nitrogen,  -  -  5.07 
Oxygen,  -  19.38 
100.00 
The  composition  of  Sanguinarine  I  found : 
Carbon,  70-03  69-82  70-02 
Hydrogen,        5-27  5-08 
Nitrogen,  5-23 
Oxygen,  19  14 
100-00 
The  atomic  weight  was  found  in  three  determinations  322-7  ; 
362-7  ;  346-4,  or  taking  the  mean  =  343-9. 
From  all  this  it  appears  that  Chelerithrine  and  Sanguinarir*o 
are  one  and  the  same  substance  corresponding  to  the  formula 
Cgg  H16  N08>    This  formula  gives  : 
Carbon,  -  70-80 
Hydrogen,  -  4-97 
Nitrogen,  -  4-35 
Oxygen.  -  19-88 
100-00 
It  will  be  perceived  that  the  above  formula  includes  one  equiv- 
alent of  carbon  more  than  the  one  I  formerly  deduced  from  the 
analysis  of  Sanguinarine. 
For  the  preparation  of  one  or  the  other  of  these  alkaloids  the 
following  method  is  the  simplest  and  cheapest. 
Digest  the  root  of  the  plant  Sanguinaria  Canadensis  (or 
Chelidonium  majus)  with  water  strongly  acidulated  with  sulphu- 
