ADVERTISEMENT. Ivîî 



Ocean, becaufe that ftar pafles daily only over it's 

 Zenith; and equally (o to the tide of twelve hours, 

 or diurnal, of the fouthern part of the South Sea, 

 becaufe it pafles, every day, over both the Zenith 

 and Nadir of that vaft Ocean ; and to the tides 

 whether femi-diurnal or diurnal of the northern 

 part of that fame Ocean, and to the variety of it's 

 tides, which here increafe at the full * and new- 

 Moons, and there, feveral dnys after, which here 

 increafe at the quadratures, and there diminilh ; 

 and to their uniform equality at other places ; and 

 to the diredion of thofe which go toward the Line, 

 and to their elevation, which increafes toward the 

 Poles, and diminiflies under the very Zone of lunar 

 attradion, that is, under the Equator. On the 

 contrary, the aflion of the heat of the fun, on the 

 Poles of the World, perfedly explains the fuperior 

 height of the tides, near the Poles, and their de- 

 preffion, near the Equator : their divergence from 



* I am of opinion, with P!in}', that the Moon by her heat 

 diflblves ice and fnow. Accordingly, when file is at the full, flie 

 muft contribute to the fufion of the polar ices, and confequently 

 to the rifing of the tides. But, if thefe increafe upon our coafts 

 at the new-moon likewife. I think that thofe fuperabundant 

 meltings have alfo been occafioned by the full Moon, and are re- 

 tarded in their courfe by fome particular configuration of one of 

 the two Continents. At any rate, this difficulty is not of harder 

 folution, on my theory, than on that of attraction, which, in other 

 refpeéls, is incapable of explaining the greateft part of the nautical 

 phenomena that I have juft i-elated. 



the 



