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£ill into the fea. I have remarked, when 

 treaiing of Ifchia, that this configuration 13 

 frequently prlfmatic, and that the prlfms 

 are conftantly formed In thole parts of the 

 currents which immerge into the water, 

 and reach to a few feet above the level. 

 This obfervation of mine certainly accords 

 admirably with thofe of M. Dolomieu ; the 

 fituation of thefe prifms clearly fliowing 

 that they were formed at the time of the 

 immerfion of the lava into the fea, Vx^hich, 

 when it flowed, rofe to where they begin 

 to appear. But, though I agree with him 

 in this, I cannot in the remainder of my 

 obfervations. Alicuda, as v/ell as Felicud.i, 

 prefents us with numerous currents and 

 rocks that defcend into the fea ; and they 

 are likewife found at Saline, Lipari, Strom- 

 boli, Panaria, JBafiluzzo, and Vulcano ; 

 but thefe rocks and currents, which to- 

 gether extend over a fpace of more than 

 fixty miles, do not aiford the flighteft indi- 

 cation of prifms. 



As I went by fea from Meffina to Cata- 

 nia, 



