EXPLANATION OF THE PLATES. XXÎX 



ATLANTIC HEMISPHERE. 



PLATE SECOND. 



Volume I. Page i88. 



THIS Plate reprefents the Atlantic Hemifphere, with 

 it's Sources, it's Ices, it's Channel, it's Currents, and it's 

 Tides, in the months of January and February. 



Though I am under the necefîîty of here repeating fe- 

 veral obfervations which have a place in the text, to thefe 

 I am going to fubjoin fome others, worthy, I am bold to 

 fay, of the Reader's mod ferious attention. 



Obferve, in the firft place, that the Globe of the Earth is 

 not reprefented, here, after the manner of thofe Geogra- 

 phers, who, in their maps of the World, exhibit it as a 

 cavity, in order to give the retreating parts the appearance 

 of being on a great fcale. Their projedlion conveys a 

 falfe idea of the Earth, by fhewing the retiring parts of 

 it's circumference, as the wideft ; and, on the contrary, 

 the prominent parts of the middle, as the narrowefl. They 

 prefent, not a convex Globe, but a concave. This figure 

 reprefents it, fuch as it would appear to an eye placed in 

 the Heavens, when the Atlantic Ocean is turned to it, and 

 in our Winter. 



You may diftinguifh in it the fources of the Atlantic 

 Ocean, which ifTue, in Summer, from the North Pole ; 



it's 



