HQ 



UNITED STATES. 



region of the interior, would move toward the ocean 

 in Hnes parallel to the equator. The direction in 

 ^ which such a chilled and ponderous air ought to 

 move would be east. Here then the atmosphere of 

 North America is acted upon by two forces, drawing 

 in the direction of the two sides of a parallelogram ; 

 one of them pulling south toward the equator, and 

 the other east toward the ocean. Now, the conse- 

 quence of these two forces exerting themselves, as 

 before-mentioned, will be, to draw the moles moven^ 

 da neither south nor east, but in an intermediate di- 

 rection between the two. This will be the diagonal 

 of the parallelogram, and its course will be, neces- 

 sarily, from north-west to south-east. But, the air 

 which is moved thus toward the south-east, must 

 come from the opposite point, and, of course, be a 

 north-wester. 



