Miscellaneous Facts and Observations. 163 



observation applies very strictly to the schistic strata 

 of the United- States. Of such strata I have examined 

 great masses, particularly in the neighbourhood of 

 Little-Beaver creek, a branch of the Ohio ; and I do 

 not recollect to have seen a single instance, in many 

 hundred, in which the shells were not compressed. 



Editor. 



35. An extensive bed of Porcelane- Earth (Argilla 

 Porcelana) has been discovered in the State of Mary- 

 land. It is found in close connection with mines of 

 iron ore, near the foot of the Ketocton-Mountain, not 

 far from Hagerstown. The earth is of a fine quality, 

 and cannot fail, at some future period, to attract the 

 attention of the manufacturers of earthen- ware. 



The Ketocton-Mountain has an extensive range 

 through the United- States. It is not improbable, 

 that the porcelane-earth will be found, in many other 

 situations, as in Pennsylvania, &c, in the vicinity of 

 this chain. Be this as it may, we have already found 

 the earth in the neighbourhood of some of the other, 

 ranges of mountains, in Virginia, and in North-Caro- 

 lina. In the first of these states, it has been known 

 for more than thirty years, by the name of " Chalk," 

 and has been used, as such, by ihe country-people. 



Editor. 



