Atlantic ocean, extending from the state of Maine, to 

 the bottom of the bay of Mexico. 



I am aware that much has been said on the subject 

 of currents, by various authors, and of the supposed 

 results in a variety of instances ; but I know of no one 

 that has, in contemplating these results, endeavoured 

 to trace them to their source, or to explain the cause of 

 the currents which produced them. It is a subject 

 which, if properly studied, may lead to a satisfactory 

 solution of these phenomena. 



This immense alluvial district forms, by far, the 

 most interesting geological trait, that is presented to 

 view, perhaps, on the continent of North America, 

 on the subject of which there exists a diversity of 

 opinions. 



According to Mr. McClure's geological chart, it 

 commences at Long Island, and stretching along upon 

 the coast, increases in breadth as we advance towards 

 its sputhern extremity, and is, in some parts, nearly 

 two hundred miles in breadth. 



On this important subject no one has, as yet, that I 

 know of. attempted a correct topographical or geologi- 

 cal description. Nevertheless partial accounts have 

 been given by several, and opinions advanced with a 

 view to account for its origin, and, (as is supposed,) 

 gradual increase. 



These opinions it becomes necessary for me to notice, 

 before I proceed to offer an explanation of my own, on 

 so interesting a point. 



