TJprEtt 

 Gallery. 



Table-case 

 in Rxess 4» 



164 



YE SU VI AN ROCKS, 



duced by the evolutions of aqueous vapour that torrents of 

 water descend the cone, and becoming charged with im- 

 palpable volcanic dust, and rolling along loose ashes, acquire 

 sufficient consistency to deserve their ordinary appellation 

 of ' aqueous lavas/ A brief period of repose ensued, which 

 lasted only until the year 1666, from which time to the pre- 

 sent there has been a constant series of eruptions, with rarely 

 an interval of rest exceeding ten years." — Lyell's " Prin- 

 ciples of Geology," 1847, pp. 358, 359. 



List of Specimens of Volcanic Rocks and Minerals 



arranged and described by ii. bauerman. 



1. — Ashes from the eruption of 1760; found at Bocco 



Tre Case. 



2. — Volcanic sand (rounded fragments and crystals of 

 augite and idocrase) from the eruption of 1794. 



3. — Similar specimen to the last ; locality and date of 

 eruption not stated. 



4, — Volcanic conglomerate, fragments of decomposing 

 and incrusted lava cemented. — Eruption of 1794 ; found on 

 the Piano del Cinestro. 



5. 



1794 ; locality not stated. 



felsp 



Eruption of 



6. — Lapillia, small fragments of scoriaceous lava from 

 the eruption of 1813 ; found at Resina. 



7. — Fine red ferruginous ashes from the eruption of 



Resin 



8. 



Monte 



Date 



9. — White pnmiceons lava, with a few transparent 

 white felspar crystals ; from Real Capo di Guoglio. 

 of eruption not stated. 



10.— Grey fumice. Date of eruption not stated ; found 

 at Fossa Grande. 



11. — Vesicular lava (externally weathered brick-red). 

 Date of eruption not stated ; found at Fossa Grande. 





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