DOMAIN I. 5IDEROUS. 



dules of common steatite, and small crystals of 

 siderite. As it only takes a very coarse polish, 

 the base is properly a basalton. 



STRUCTURE I. AMYGDALITE WITH AGATES. 



From Oberstein on the Rhine. 



The same, with cubic zeolite. 



The same, with veins of glassy chalcedony, ac- 

 companied with a band of the colouring matter, 

 which would form agate. 



Brown amygdalite, from the same. 



Amygdalite, with chalcedony, zeolite, &c. from 

 the Isle of Skey. 



Faujas has given a good list of the products of 

 Kinnoui. Kinnoul, but ridiculously calls them lavas. He 

 mentions black basaltin joined to basal ton, the 

 latter presenting small crystals of felspar, so as to 

 assume a porphyritic appearance. The same com- 

 pact basaltin, in columns. Green basalt, very 

 firm and sonorous. Basalt with crystals of fel- 

 spar, and attracting the magnet. A square prism 

 of the same, with a carnelian on one of the sides. 

 The same, with globules of green earth, agate, and 

 calcareous spar, &c. 



Moca. Beautiful agates, or what are called moca- 



stones, also occur in a rivulet called May, which 

 falls into the Era near the house of Condie, in 



