ITALY. UTTER XIX, 27$ 



found in the pietra forte am mon's- horns, and feve- 

 ral imprefiions of plants. The plates or lamellae 

 of the yellowifh pietra forte appear in the furface 

 to be traced with lines, arifmg from thin fpar-la- 

 mellse, which crofling the (tone form rhombo'ides, 

 in which accordingly it breaks. On other fuch 

 plates appear worm-like mouldings, which Scheuch- 

 xer has defcribed under the name, Lapis Floren* 

 tinus Lumbricaria diffus. Red boles are common 

 in the fifiures and clefts of the pietra forte. Some 

 pieces of this (lone are thin-mivery and bent like 

 waves, as appears in the pavings at Florence ; 

 which, however, are as flat and even as a chamber- 

 floor ; confifting of joined plates of pietra forte, 

 which generally are broken into natural rhomboides 

 and pentagons. The weaknefs of the eyes, to 

 which many Florentines are fubjec~r., is commonly 

 afcribed to the fliining white or grey colour of 

 thefe pavings. But it is ftill more common at 

 Naples; where the lava pavings are rather of a 

 black colour. In both places fpectacles are very 

 commonly and conftantly worn. 



3. Cave di Pietra forte di S. France fco di 

 Paolo. Here are likewife bardelloni between 

 the beds or plates of pietra forte, \vhich is 

 remarkably affected by acids, and crofled by 

 fpar lamellae, that form pentagons. Pn the 

 T pietra 



