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prcfentations of Shrubs, Trees, Land- 

 fcapes, Ruins, £sfc. and are found in great 

 Quantities in feveral Parts of Germany, 

 It is the Opinion of a great Naturalifl, 

 and there is a great Probabihty of its be- 

 ing the Truth, that thefe Pigures are oc- 

 cafioned by mineral Exhalations, which 

 ftaining the original foft Matter of which 

 the Slate is afterwards formed, the Traces 

 remain, and continue vifible after the 

 Slate has attained its ftony Confiflence, 

 whence that Variety of natural Pidures 

 to be feen in thefe Specimens. 



T^;t^, Earths, are the various Kinds 

 of earthy Matter found in digging. They 

 are friable, opake, infipid Bodies, not in- 

 flammable, vitrifiable by extreme Heat, 

 diffufible in Water, and feparable from it 

 by Filtration. They are divided into 

 fimple and compound ; the fimple com- 

 prehends the Boles, Clays, Maries, Ochres, 

 and Trlpelas ; the compound takes in 

 the LoamiS and Moulds. "When ufed in 

 Medicme, the different Kinds have va- 



^ rious 



