ITALY. LETTER I. J 



was of a compact grain ; but part of the upper- 

 moft beds was fpungy and porous like tophus, 

 and ferruminated with blunt pebbles and other 

 loofe ftones. In other places thefe fuperior beds 

 offered oblong fcaly pifolites cemented together. 

 Now and then black limeftone was found inclofed 

 in the grey, and, partly indurated, had got the 

 nature of hornftone-rock. I faw likewife black 

 limeftone with white veins. Near Faijlriz and 

 between Ernhaufen and Marburg, I obferved dif- 

 ferent detached pieces (gefcbiebe] of a blueim grey 

 trapp, containing quadrangular fherl-cryftals, of a 

 remarkable length and bignefs. 



Between Faijlriz and Cornuwiz the following 

 ftones offered on the road. i. Large red garnets 

 in green fparry fherl, and among them feveral 

 fcaley ones of a micaceous or glimmery contexture. 

 2. Black feather, or ftrahl-fherl, in large pieces in- 

 clofed in white quartz. 3. Green jafper. I know 

 very well that detached ftones give no great evi- 

 dence ; but they give fome hints of the nature of 

 the neighbouring hills ; and if heaped near the roads 

 as repairing materials, there is good reafon to 

 fuppofe their quarries very near, efpecially if they 

 do not appear under a blunt form, but pointed and 

 frelh- broken. 



The limeftone appeared here to be covered by 

 a thin bed of breccia or pudding-ftone, compofed of 

 blunt pebbles cemented by lime. 



B 4 Between 



