49 



Falls, and Gwinn's-Falls, and upon the west side, con- 

 tain, it is true, rolled pebbles of almost all sizes, from 

 that of a pea to that of five or six pounds weight ; and 

 they abound, a mile or a mile and a half to the west of 



support of this opinion, there are but very few pebbles in the nor- 

 thern part of the section, and those small Moreover there are 

 other appearances in this section of the hill which (setting all con- 

 jectures aside) amount to proofs positive that the pebbles were 

 brought and deposited there by a powerful current from the north. 



Among the pebbles in the bank, on the south side of the ridge, 

 I have counted upwards of thirty masses of granite, micacious 

 schist, and green stein. Now well defined granite does not occur 

 within one mile to the north of where these masses now lie ; and 

 the green stein range does not occur to the north within three miles. 

 To the south of the ridge, neither granite nor green stein were ever 

 known to exist in place ; for from the bank in which these masses 

 now lie, to the capes of Virginia, every foot of land is alluvial. 

 Therefore the fair conclusion is that they must have been brought 

 and deposited there by a powerful current from the north ; for in 

 no direction to the south do the same kind of rocks exist within the 

 distance of five and perhaps six hundred leagues. 



As the appearances in the above described bank, or section of 

 the hill, are liable to changes by the operations of rains, or by dig- 

 ging and levelling for the purposes of building, and which may here- 

 after render the statement doubtful, they have been examined 

 by two respectable gentlemen who will substantiate the facts, as 

 described. 



Similar facts, I believe, are observable from one extremity of 

 the granite ridge to the other, or from New-York to Georgia. I 

 have observed them in numerous instances in the alluvial region, 

 and south of the granite ridge, and particularly in the city of Wash- 

 ington. At a little distance north of the United States Branch 

 Bank in that city, is a circumscribed spot of about one acre of 



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