DOMAIN X. TRANSILIENT. 



The clay-slate of that author, thonschiefer, is 

 our slate, simply so called by way of eminence, 

 but a grand and primitive rock 5 while the other 

 is understood to be of recent formation. 



HYPONOME 1. 



Uniform. 



HYPONOME II. 



With impressions. 



The following transitions are upon a larger 

 and more various scale ; but may be here sub- 

 joined, in order to throw more ample illustration 

 upon a curious and intricate topic. 



Saussure has minutely described a singular 

 transition from granite to limeslate, which he 

 observed not far from Courmayeur*. 



" Travelling through these pasturages, the 

 eyes always fixed on the primitive chain, I saw 

 below this chain beds similar to slates, and lean- 

 ing against rocks of granite. As nothing in my 

 mind is more interesting for theory, than the 

 junction of mountains of different orders, I de- 

 termined to examine this 5 but as it was too late 



* 872. 





