GEOLOGY. 167 



sulphur to coal. The latter is thus endowed with posi- 

 tive electricity. 



802. Coal is, however, the fundamental body of the 

 metals. The metals are consequently related as positive 

 electrics to sulphur. Sulphur is air-metal or idio- 

 negative ; metal is earth- or idiopositive sulphur. Sul- 

 phur therefore occurs almost solely with metals, as iron, 

 pyrites, glance ; yet frequently with arsenic, the metal 

 that resembles it, e. g. in realgar. 



803. Sulphur is the basis of all idioelectrism, and this 

 property occurs only in bodies, in so far as they are posi- 

 tions of sulphur. 



804. Magnetism and electrism are correlated, as iron 

 and sulphur, as gravity and light, as centre and peri- 

 phery. The same spirit, which when ruling in the dark, 

 exhibits itself as magnetic, is manifested when it has 

 attained to light in sulphur as electrical. Magnetism is 

 only the electricity identified. 



805. We may therefore speak of idiomagnetic metals 

 as well as idioelectric bodies. 



806. Magnetism therefore stands in accordance with 

 these relations in opposition to electrism ; they mutually 

 change or annihilate each other. 



807. Electrism has, in accordance with its signifi- 

 cation, the power of manifesting itself with one pole 

 accumulated or set free from the other, as e. g. the nega- 

 tive in a cake of resin ; in magnetism, on the contrary, 

 both poles are always together and inseparable. The 

 radius is divided into two in every part of its length. 



808. As the functions of metal and of sulphur are cor- 

 related, so also are their substances ; they are opposed, 

 and hence the metallization by means of sulphur with all 

 its results. This antagonism is, however, dormant or 

 concealed ; that of the functions manifests itself much 

 more clearly. 



809. The metals, as being dense, central, and linear 

 masses, must fall into a state of tension with electricity 

 as with heat ; this is called conduction. The metals are 

 therefore conductors of electrism. In antagonism to 



