22 TRAVELS THROUGH 



"i k Limeftone of the Alps. In thefe, as com- 

 monly in the calcareous hills, occur now and then 

 fubterraneous caverns or natural grottos. A remain- 

 ing part of fuch a cavern, or rather its upper 

 covering, which refembles a bridge, is defcribed 

 in Defcrizione d'un meravigliofo pcnte naturah ne' 

 monti Veronefi. Verona, 1766, 410. 



2. Black found lava; with and without white 

 garnets. 



3. Spungy and porous reddiih grey lava. 



4. Black found lava ; with oblong white fpots, 

 firnilar to Serpentino antico. 



Between Vicenza and Padua, towards la Mira, I 

 faw detached lavas and limeftones. 



Abbe Fortis> whom I noticed in one of my 

 former Letters, has quitted with the Pope's con- 

 fent his regular order, and is at prefent in Dalma- 

 tia ; where, at the expence of three Venetian no- 

 blemen, he makes obfervations on Natural Hif- 

 tory. Mr. Angela Donati, a relation of the cele- 

 brated Naturalift, and a fkilful draughtfman, was 

 for feme time his companion 5 but he is returned 

 already to Venice. 



LET- 



