ITALY. LETTER XI. 139 



e. Amethyftine quartz cryvballifations. Ibidem. 

 I doubt their being Vefuvian ones. 



2. Agate; white with red ftripes, of the fame 

 kind ; which, on account of the angulated ftripes, 

 is in Saxony called fortification- agate. Ibidem. 

 To me dubious. 



3. Gypfum, or felenite, in tranfparent lamella?; 

 fimilar to the lamellated felenites of Montmarlre, 

 In the collection of Bottis. 



4. Amiantb. Ibidem. Dubious again. 



5. White, fcaly, or lamellated calcareous f-par \ 

 confifting of coarfe and finer fcales ; found in 

 confidera.ble .quantities all around Vefuvius, in 

 loofe fragments, often of the bignefs of a man's 

 head, or even in greater ones ; in the fame col- 

 left ion. 



6. White limeftone or marble, in fimilar Graying 

 loofe pieces; fome burnt and calcined ; they are 

 found likewife in the alhes and lavas, and then 

 conftantly calcined and farinaceous. The Vefu- 

 vian guides prefented me with quantities of white 

 calcareous ftalaclite ; confiding of piiblithes in a 

 mafs of globules, but thofe were folid without any 

 mark of fcales. Though they affured me of thefe 

 ftpnes being frequent in the funnel, I never could 

 find any, either there or in other places of the 

 mountain. 



7. Hexagonal^ columnar, pyramidical, calca- 

 reous J-par-cryftallifations* In Mr. Bot tin's collec- 

 tion. Dubious, 8. 



