28S TRAVELS THROUGH 



the depth of a fathom , being taken out, the water 

 fprings with violence from the hole which it had 

 produced. Somewhat higher, following the new 

 road to the inn called // piano del oglio, there are a 

 great number of pits, in which they gather petro- 

 leum fwimming on the furface of the water. Ra- 

 tnazzini and Valifneri have defcribed the Salfa di 

 Modena. Arioflo y a relation of the poet, has like- 

 wife defcribed it in a performance inferted by Ra- 

 muzzini. Wells may be dug and found in any 

 place of the Modanefe. Ramazzini's treatife De 

 admiranda fontium Mutinenfium origtne, Mutina?, 

 1691, 410. is worth perufmg. In the hills near 

 Vignola, and in feveral other places of the Moda- 

 nefe, they find red agates, cornelians, and differ- 

 ent forts of jafper, which are exported to Mi- 

 lano. There are alfo fome copper-mines in the 

 Apennines belonging to this country, efpecially 

 Alle Pievi di Reno al Vefolo ed air antico cajtello 

 di Medola nella provincia Grafagnlana. Hills of 

 Gabbro or Serpentine not wanting. 



LET- 



