32 Dr. Heinrich Will on the Compositioyi 



acid was to the nitrogen in the proportion of 8 : : 1 l)y vo- 

 lume, accordingly 8 : : 2 in atomic proportion. 

 This gives the following result. 



1. 2. 



Carbon 35-760 3602 



Hydrogen ... 5-038 4-99 



Nitrogen 10-350 10-43 



Chlorine 25-930 26-10 



Oxygen 22-922 22-46 



100-000 100-00 



Theoretical composition. 



In 100 parts. 



16 at. Carbon 1222-96 35-60 



28 at. Hydrogen ... 174-71 508 



4 at. Nitrogen 354-08 10-30 



4 at. Chlorine 885-30 25'75 



8 at. Oxygen 800-00 23-27 



3437-05 100-00 



From this formula Prof. Liebig has shown that it may be 

 considered as a combination of 3 atoms aldehyd, 2 atoms 

 chlorcyan, and 5 atoms of water, as follows. 



3 at. Aldehyde = Cjg Hig O^ 



2 at. Chloride of cyanogen = C4 N4 CI4 



5 at. Water ' = H,n 0= 



1 at. of the combination Cje Hgg Og N4 CI4 



VIII. On the Composition of Chelidonin and Jervin. By Dr. 

 Heinrich Will*. 



T^HE organic bases employed in the following analyses 

 -* were prepared and sent to me to be analysed by their 

 discoverers ; the chelidonin by Dr. Probst of Heidelberg, 

 and the jervin by E. Simon, apothecary in Berlin. 



Chelidonin-\. — The chelidonin, whose properties and mode 

 of preparation have been described by Probst, forms a pure 

 while, soft powder, and is also obtained in a crystalline form. 

 When heated it melts into a colourless oily fluid, which be- 

 comes brown at a stronger heat; finally it takes fire and burns 

 away with a bright smoky flame, without leaving the least 

 residue. The base dried in the air contains water of crystal- 

 lization which disappears completely at a temperature of 100 



• From Liebig's Annalen der Pharmacie for July, 1840: vol. xxxv- 

 part 1. 

 1 See the Supplementary Number for the present month, vol. xvii. p. 543. 



