I20 September 1748, 



quite fmooth and roundifh on the outfide, 

 and lay in a ftratum which was a foot deep. 

 Then the brick-coloured clay mixed with 

 fand appeared again. But the depth of this 

 ftratum could not be determined. Query^ 

 could the river formerly have reached to 

 this place and formed thefe ftrata ? 



Mr. Bar tram has not only frequently 

 found oyfter-fhells in the ground, but like- 

 wife met with fuch fhells and fnails, as 

 undoubtedly belong to the fea, at the diA 

 tance of a hundred and more Englijh miles 

 from the (hore. He has even found them 

 on the ridge of mountains which feparate 

 the Englijh plantations from the habitations 

 of the favages. Thefe mountains which 

 the Englijh call the blue mountains, are of 

 confiderable height, and extend in one 

 continued chain from north to fouth, or 

 from Canada to Carolina. Yet in fome 

 places they have gaps, which are as it were 

 broke through, to afford a paffage for the 

 great rivers, which roll down into the 

 lower country. 



The CaJlia Chamcecrijla grew on the 

 Toads through the woods, and fometimes 



on 



The common ^artz. Former's Mineralogy, p. 16. 

 And ^artztwi coloratum, Linn. Syft. nat. j. p. 65. 

 ^artzum /olidum opacum coloratum. Wall. Min. 99. 

 The impure ^artz, Forft. Min. p. 16. 



