ITALY. LETTER XXV.' 21 



Between Bergamo and Brefcia I obferved blunted 

 limeftones, and vail quantities of different de* 

 tached lavas, which prove, that to the north of 

 this country there are trafts of volcanic moun- 

 tains. Thefe lavas were : 



i. Black found lava ; 



2. with inclofed white gar- 

 nets; 



3. Red lava, with fmall garnets and fherl-cryf- 

 tals, perfectly refembling porphyry. Large moun- 

 tains in the Bergamafco confift of fuch lava-rocks, 

 which are dug and cut there into columns and 

 chimney-pieces, felling at Bergamo under the 

 name of Sarres. This fpecies has the hardnefs of 

 porphyry. 



4. Red hard lava, fimilar to the former fpecies, 

 but containing befides large white fherl-parallelo- 

 pipeds. 



Behind Brefcia occurred grey limeftone- hills, 

 which belong to the Alps. 



Then I obferved on the road to Verona pieces of, 



1 . Sound black lava ; 



2. The fame with white (herl-cryftals* 



3. Fragments of columnar bafaltes. 



4. Red porphyry-like lava, with white garnet- 

 like flierls. 



5. Grey limeftone. 



Between Verona and Vicenza 1 faw detached, 



Y i Lime- 



