{ V3 ) 



Befides the porphyritic lavas with which 

 the Eolian ifles abound, we have feen that 

 they contain great quantities of tufas ; and 

 thatStromboU is diftinguiihed from the other 

 iflands not only by its volcano, but by the 

 beautiful fpecular iron it affords ; and Lipari 

 by its chryfolites and zeolites, but ftill more 

 by the prodigious quantities of pumices and 

 glaifes which it contains. I cannot, indeed, 

 refled: on thofe enormous mafles of vitrifica- 

 tions, without renewed wonder ; which has 

 been ftill more increafed by the difcovery, 

 by means of the forceps and coral net, that 

 thefe vitrifications are continued from Li- 

 pari, till they join thofe of Vulcano, v/hich. 



