XXX EXPLANATION OF THE PLATES. 



it's channel formed by the proj edging and retreating parts 

 of the two Continents; and it's difcharge comprehended 

 between Cape Horn, and the Cape of Good-Hope, by 

 which this Ocean empties ilfelf, in Summer, into the In- 

 dian Ocean. 



The oppofite fide of this Hemifphere, though ftill, in a 

 great meafurc, unknown to us, would prefent, as well as 

 the Northern, a fluviatic channel with all the fame accef- 

 fories ; fources, ices, currents, and tides, formed, not by 

 Continents, but by the projetions of il'ands, and of it's 

 ileep beds, which dire£l, during our Winter, the courfe of 

 the Southern polar-efFufions into the Indian Ocean. How- 

 ever interefting thefe newproje6lions of the Globe may be, 

 it was impofllble for me to make the expenditure ncceffary 

 to procure engravings of them. It would have been ex- 

 tremely defirable to have exhibited a reprefentation of both 

 Hemifpheres, each in it's Summer and in it's Winter, in 

 order to fee their different Currents at each feafon, and to 

 have prefented a bird's-eye view of the Poles themfelves, 

 as well in Winter as in Summer, in order to convey an 

 idea of the extent of the cupolas of ice which cover them, 

 and the currents which iflue from them, at the different 

 feafons of the year. Thefe different feétions would have 

 required at leafl eight plates on a fcale greater than this, 

 perceptibly to unfold the harmonies of this fingle branch of 

 my Studies of Nature. Befides, this increafe of charts 

 would have led to more particular and more copious de- 

 tails, refpedling the diflributions of the Globe, which I 

 did not mean to treat in this Work, except as the fubjedl 

 Occafionally prcfenttd. 



The 



