1824.] MM. Dumas and Pelletier on Organic Salifiable Bases. 47 



C G, F H, platina points soldered to the wire C D E F. 



K L, a cylindrical piece of wood, having a perforation to admit 

 the magnet, and a circular groove containing mercury, in which 

 the points G and H revolve. 



ef, a copper wire passing through the bottom of K L, and 

 communicating with the mercury in the groove. 



M O, cups filled with mercury. 



P N, wires passing from the positive and negative ends of the 

 exciting apparatus. 



The current from the positive pole P ascends through the 

 magnet to I, descends down D G, EH, into the mercury in the 

 circular groove, and from thence through the copper wire e /', 

 into the cup M, connected with the negative pole by the wire N. 



Article X. 



On Organic Salijiable Bases. By MM. Dumas and Pelletier.* 



The following is the analysis of these compounds given by 

 these chemists : 



MM. Dumas and Pelletier calculate that quinina is consti- 

 tuted of 



Atoms. 



Carbon 60 or in 100 parts nearly 75*38 



Azote 3 8-72 



Hydrogen 30 6-15 



Oxygen 3 9'85 



96 



100-00 



If, however, we calculate the weights of the atoms as given 

 by Dr. Thomson, Dr. Henry, and Mr. Brande, it will be found 

 that the number of atoms which enter into the constitution of 



• From the Annalcs de Chimie et de Physique, vol. xxiv. p. 191. 



