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Under this Title are many Specimens' 

 of Slates and Pebbles, having on therii 

 the perfed Figure of Fern and other 

 Leaves ; in fome of them the Plant is 

 immerfed, but proje6ls from others of 

 the Stones. Thefe Kind of Slates and 

 Pebbles are frequently found at the Top 

 of Coal Mines. Some of the Mines in 

 Somerfet/Iiire have the Vein covered by a 

 brittle Kind of foft Slate, which they call 

 there Wark : It is ealily feparable into 

 thin Plates, and, when divided, there is 

 found on one of the Plates a protuberant 

 Refemblance of a Fern Leaf. 



At Stamfop in Staffcrdfliire are often 

 found Stones in the Form of Vege- 

 tables of various Kinds and fome have 

 the exa6l Figure of different Sorts of 

 Fruit, as Pears, i^c, and many of them 

 refemble the Shell of an Almond, or a 

 Peach-ftone. 



Grapiclithi^ figured Slates, They are 

 a foft Kind of Marble, and have by Na- 

 ture delineated on them very lively Re- 

 G 2 prefentations 



