292 M. Avogadro on the relation of the Density of Bodies 



2d Group. Alkalifiable Metals. 



Potassium, 

 Sodium, 



Affinitary 

 Number. 



3.300 



3.371 



Neutralizing 

 Power. 



+ 1.291 



+ 1.361 



By applying the same formula to frangible metals, M. Avo- 

 gadro has obtained the following results : 



M. Avogadro considers these results only as approximations, 

 particularly for the frangible metals, to which the formula is 

 perhaps less exactly applicable than to the ductile metals. 



In applying the formula to bodies which are not metallic, 

 M. Avogadro supposes that the molecules either remain with- 

 out alteration, or double and quadruple themselves in passing 

 from the gaseous to the solid state. In sulphur and iodine the 

 gaseous molecule suffers no change. In antimony and sele- 

 nium two molecules go into one in the passage to the solid state, 

 and so on with the other bodies, as given in the following table : 



The formula by which this table is computed is changed in- 

 to A = -S7-- J -=- 1.472 J — , for reasons which our author 



V2 D — D' 



has fully explained. 



