itALY. LETTETl XX. 2$t 



tilled j which, as all the following, dipped from 

 S. E. to N. W. in nearly twenty-three degrees. 

 The fummit or back of this hill was plain and 

 flat. Here is a tile-manufactory, in which the 

 before-mentioned mouldering and Ihivery clay 

 is baked. This hill continued gently afcending: 

 two miles nearer Creica, I faw fragments of coarfe 

 calcareous fpar in the argillaceous flate, its fmall 

 beds by different mixtures coloured black and 

 red-, thefe red-coloured ones broken in regular 

 oblique cubes or rhomboides. There appeared in 

 it fmall and accidental beds of yellow feparated 

 limeftones, covered with dendrites. 



Scon after the fhivery argillaceous flate, ceafing 

 to be micaceous, alternated with large grey lime- 

 fione-ftrata. Thefe hills continued to the left, and 

 role very high. They go under the narrie of tne 

 Apennine Alps j which accordingly confift of large 

 beds of grey and compact limeftone, now and 

 then, butfnot generally, feparated by fmall argilla- 

 ceous ftrata. They are never found in the higheft 

 mountains. The road going fideways from thefe 

 higher mountains, I travelled along a little brook, 

 eight miles farther j where I obferved, in the 

 calcareous ftrata, fifTures rilled and healed up again 

 by cryftallized fpar. The fame fpar offered in 

 the argillaceous beds in lumps and nodules. The 



road 



