Iviii ADVERTISEMENT. 



the Pole whence they flow, and their perfeA con - 

 cordance with the Continents from which they de- 

 fcend ; being double in twenty-four hours, when 

 the Hemifphere which emits them, or which re- 

 ceives them, is feparated into two Continents; 

 double and unequal, when the divergency of the 

 two Continents is unequal ; fimple and fmgular, 

 when there is only one Continent which emits 

 them, or when there is no Continent at all, 



3dly. The attradion of the Moon, which goes 

 always from Eaft to Weft, cannot in any refpeft be 

 applied to the courfe of the Indian Ocean, which 

 flows for fix months toward the Eaft, and fix 

 months toward the Weft ; nor to the courfe of the 

 Atlantic Ocean, which flows fix months to the 

 North, and fix months to the South. On the con- 

 trary, the aétion of the half-yearly and alternate 

 heat of the Sun, around each Pole, covered with a 

 Sea of ice, of five or fix thoufand leagues circum- 

 ference, in winter, and of two or three thoufand in 

 fummer, is in perfeâ: accord with the half-yearly 

 and alternate Current which defcends from this 

 Pole, in it's flux toward the oppofite Pole, con 

 formably to the diredion of the Continents, and of 

 the Archipelagoes, which ferve as fliores to it. 



On this fubjed I beg leave to obferve, that 

 though the South Sea does not appear to prefent 



any 



