24 TRAVELS THROUGH 



either puzzolana-quarries, or flickers for cattle arid 

 implements of hufbandry. 



D. In my journey to Raduofani, I defen- 

 ded from Aquapendente and a lava-hill into a 

 valley, which feemed to have been a part of the 

 periphery of an old volcano funk into the valley. 

 Soon after I patted an arm of the Paglia-nver, 

 behind which i faw hills of grey and blue unftra- 

 tified marl; with blunted and detached limeftones, 

 I pafled afterwards feveral branches of the Paglra, 

 filled with thefe limeftones, fand, and marl, and 

 blunted pieces of a pudding-ftone, ferruminated 

 of rolled globular fragments of lava, and white 

 lirneftones in a calcareous cement. This Breccia 

 is called in Italy cicercbtna ; and I faw the fame 

 in Krayn, and in the pebbles of the river Greife 

 near Florence, where they employ it to the coarfer 

 grinding of marble. 



The Radicofani-hill, whereoh the caftle is 

 fituated, is a fteep and ifolate volcanic rock, fur- 

 rounded every where in the valley with the before- 

 mentioned marl, and eompofed i. of grey; 2. 

 black and compact i 3, porous; 4. red and com- 

 pact lavas; 5. red pumice-flones ; and 6. a black 

 (crnpacl: lava^ with white transparent garnet-like 

 lherl-cryflallizations. ; Thefe varieties alternate 

 without any order; and generally they are fplit 

 and broken into perpendicular fiffures, or irregular 

 A undeter- 



