8 TRAVELS THROUGH 



Between Zila and France I found near the road 

 horny indurated red iron-clay or Bolus, with quar- 

 zy veins. 



Between France and Ufwold, near to the limit 

 . pyramid of Steyermarck and Crayn, and the trium- 

 phal-arch, rifes from under ground a black table- 

 flate hill. It is of a remarkable elevation, and con- 

 tinues till near Lanbacb; however the limeflone, 

 which covered it, appears on both fides. 



Similar flate- hills rife above their calcareous roof, 

 between Laubacb and Upper Laubach. In the 

 foreft near Laubach I found, on the furface of 

 the hill, a fmall bed of reddilh fea-fand, dug out 

 as materials for repairing the road. 



Between Upper-Laubacb and Hydria, the flate- 

 hills are covered by common limeftone, which 

 here, for a long way, was light-grey, and after- 

 wards changed to a black colour. 



Hydria is a fmall irregular place, fituated in a 

 deep valley, on both fides of a river, which bears 

 the fame name j it is furrounded every where with 

 : high towering mountains of black limeftone. In 

 this valley the black flate rifes naked from under 

 ground, between forty-five and feventy-five de- 

 grees, having limeflone both in its hanging and in 

 its hading fide. The famous rich mercurial mines 

 are funk in it ; and the flate, more or lefs pene- 

 trated by mercury and cinnabar, is nearly twenty 

 Jrlydrian fathoms deep, extending into the field 



about 



