( 221 ) ; 



are derived from the tion^volcanic — Our 

 commoftjirc equally vitrifies the Euganean 

 lavas, and thofe of other volcanos — Singu- 

 lar obfervation relative to the eafy fufon of 

 feltfpars — Euganean bafaltes the products 

 of fre — One of the fl ones of thcfe moun^ 

 tains formed in prifms in one place i?i the 

 dry ivay, and in another in the humid — 

 Confrmatio7t of the offer tion, that it can 

 ordy be determined by local circumflances^ 

 which of the two modes Nature has em- 

 ployed in the conformation of bafaltes. 



I 



N the year 178S, I prefented the Impe- 

 rial Mufeum of Pavia with an ample col- 

 ledtion of volcanic prcdudlions, from the 

 two Sicilies ; and afterwards formed the de- 

 fign of increafing it, during the vacations 

 of the following year, with others of the 

 fame kind from the mountains of Padua 

 which had been extindl from time imme- 

 morial. This defign I carried into efFe<ft 

 with the affiftance of a companion, than 

 whom I could not have wifhed for one 



better 



