NOME I. COMPACT LAVA. 315 



different interpretation. Hence the genera of . 

 Dolomieu are, 1. Compact lava. 2. Porous lava. 

 3. Scoriae, &c. &c. ; while the genera of Wer- 

 ner are Flint, Clay, Lime, &c. Here, on the 

 contrary, basaltin remains a mode among the 

 siderous substances, being only a different com- 

 bination ; while among the volcanic it becomes 

 a hyponome, being amidst the accidential, not 

 the elemental, rocks; not in a series of similar 

 combinations, but in a mere assemblage of sub- 

 stances of quite distinct natures, but all altered 

 by fire. 



HYPONOME I. VOLCANIC BASALTIN. 



Volcanic basaltin from Etna, Vesuvius, the isle 

 of Bourbon, &c. 



The same, with olivine, from the isle of Bourbon. 

 The same, with zeolite, from Etna. 



Micronome 1. The same, with various sub- 

 stances involved in the volcanic torrent. 



Micronome 2. The same, with fragments of 

 ejected rock. 



Micronome 3. Compact lava, with melted gar- 



