MODE XIV. SfDEROMAGNESIAN ROCKS. J31 



ing the north pole, and the northern side the south 

 pole. 



Rocks of the same kind may probably be dis- 

 covered in other countries; at any rate many ser- 

 pentines are so replete with iron as to fall into 

 this division. 



Saussure, 1342, gives a minute description of 

 what he calls granular serpentine. It is so much 

 impregnated with iron, that it belongs to the si- 

 deromagnesian rocks. 



The mountain called Roth Horn is in a great 

 part composed of compact serpentine, semi-hard, 

 that is, of the hardness of marble. It is called 

 the Red Horn, because the serpentine, though 

 green within, is red on the surface, from the oxyd- 

 ation of the iron*. 



* Sauss. 215?. 



