244 TRAVELS THROUGH 



Near 5. Quirico the hills confifted of calcareous 

 tufo, with inclofed fea-fhells. This tuphus or 

 porus confided of a light-yellow fine calcareous 

 earth, mixed with fome clay, ferruminating and 

 containing different fpecies of fea-fhells, fmall 

 blunted quartz, and limeftone fpar-grains, and 

 oval lumps of green marl, whofe colour is like 

 the mountain green, or chryfocolla. There is a 

 great variety of well-preferved fhells in this yellow 

 Jime-porusi among feveral great echinites there 

 appear, now and then, the cucurbit es 9 or the echi- 

 nites floridus. Mercati Metallotheca Vatic, p. 233. 

 It contains likewife a fingular pyrites, which Mer- 

 cati calls mtmmum diaboli. Near the country-feat 

 Cafa nova are found Iridi nere y or loofe and fepa- 

 rated black quartz- cryftals, pointed on both ends. 

 I had pa(Ted in this way over many arms of the 

 river Fiumirigo ; in which the blunted limeftones 

 are very common. They are either employed in 

 mending the roads, or gathered to be burnt into 

 quick-lime. Some Italian miles before I reached 

 ' 5. Quirico, I met with the celebrated Eagni di S. 

 Filippo *. The houfes in S. Quirico were built 



of 



* Thefe hot fprings lye on the defcent of mount S. Fiore, 

 and depofe a fediment of fulphur and a fine calcareous porus 

 or tuphus, which ;s more or lefs penetrated by vitriolic acid, 

 or more or lefs felenidc. They are defcribed by Dr. Leonardo 



Vegm, 



