DOMAIN I. SIDEROTIS. 



The same, from Andernach on the Rhine. 



The same, from the Sierra Morena, or Black 

 Mountains, in Spain. 



The same, from Toplitz in Bohemia. 



Black basaltin, from Egypt. 



Green, from the same. 



Red basaltin, from Channelkirk in Scotland. 



Brown, from the same. 



Stratiformed basaltin, from Saxony. 



The same, from Etna, Vesuvius, the isle of 

 Bourbon, New Spain, and other volcanic re- 

 gions*. 



Aspect 2. Mingled. Basaltin, with nodules 

 of steatite, from the isle of Skey in Scotland, 

 Westrogothia, &c. 



Black basaltin, with red zeolite, from Sweden. 



The same, with white zeolite, from Staffa, Giants" 

 Causey, c. 



The same, with many beautiful varieties of zeo- 

 lite, from the Faroe isles. 



The same, with zeolite, from Etna, &e. 



The same, with grains of pyrites, from Hunne- 

 berg in Sweden, Dauphiny, &c. 



* Saussure mentions, 14Q7, a kind of basalt which may be 

 called laminar: and, 548, a singular roche de come, (basaltin?) 

 in thin leaves, with mica, quartz, and felspar. If compact, he 

 says, it would have formed a genuine porphyry. How > 



