XXX ADVERTISEMENT. 



This fourth nautical experiment, accordingly, 

 proves that the South Pole is elongated, as well as 

 the North Pole ; for if both were flattened, the 

 Currents would fct in towards them, inftead of 

 flowing toward the Line. 



Thofe Southern Currents, are not fo violent at 

 their fource as the Northern, becaufe they are not, 

 like them, coUeded in bays, and afterwards dif- 

 gorged by ftraits ; but we fhall fee prefently that 

 they extend quite as far. 



VIII. The fifth nautical proof of the elevation 

 of the Poles above the Horizon of all Seas, is 

 founded on the rapidity, and the length of their 

 Currçnts, which perform the tour of the Globe. 

 The Reader may confult, on this fubjeél, the ex- 

 tent of my refearches, and of my proofs, at the be- 

 ginning of my firft Volume, in the explanation of 

 the plate, Atlantic Hemifphere. I quoted, firft, 

 the Current of the Indian Ocean, which flows fix 

 months toward the Eaft, and fix months toward 

 the Weft, according to the teftimony of all the 

 Navigators of India. I have demonftrated that 

 this alternate and half-yearly Current cannot pofli- 

 bly be afcribed, in any one refpe6t, to the courfe 

 of the Moon and of the Sun, which uniformly 

 move from Eaft to Weft, but to the combiried 



heat 



