34< Dr. Heinrich Will on the Composition 



The foregoing determination of tlie water of crystallization 

 gives exactly 2 atoms of water to 1 atom of chelidonin. 



The theoretical composition of the chelidonin, in the calcu- 

 lation of which the hydrogen was taken as agreeing very near, 

 perhaps too near with what was found by experiment, is the 

 following : 



In 1 00 parts. 



40 at Carbon 3057-40 68-90 



40 at Hydrogen 249-59 5*62 



6 at Nitrogen 531-12 11-97 



6 at Oxygen 600*00 13-51 



1 atom of anhydrous chelidonin = 4438-11 100-00 



2 atoms of water 224-96 4*82 



1 atom of crystallized chelidonin =4663-07. 



The chelidonin-chloride of platinum consists of 1 equiva- 

 lent of muriate of chelidonin. 



Calculated. Found. 



1. 2. 



4893-24 69-78 70-08 69-70 



^ pLtinum"'^'..'!^} 2118-80 30-22 29-92 30-21 



7012-04 10000 100-00 100-00 

 or 



In 100 parts. Obtained, 



1. 2. 



1 equivalent of "1 

 cnelidonm J 

 1 do. platinum 1233-50 17-59 17-42 17-60 

 3 do. chlorine 1327-95 18-94 



1 do. hydrogen 12-48 0-18 



7012-04 10-000 

 The composition of the chelidonin stands in remarkably 

 close relation to'that of narcotin, if we retain for the latter as 

 the truer the older formula given by Liebig : 



Chelidonin is C^o H40 Ng Og 



Narcotin C40 H40 N^ 0,2 



It is evident that in chelidonin with an equal number of 

 atoms of carbon and hydrogen, the oxygen of the narcotin 

 is wholly or in part replaced by nitrogen. Experiments to 

 change one into the other remained without result. If we 

 dissolve narcotin in a solution of ammonia in alcohol, and 



