ADVERTISEMENT. 



li 



" hitherto unknown." (Neivtons Phllo/ophy, Chap. 

 18.) 



This other caufe hitherto unknown, is the fufion 

 of the polar ices, which confift of a circumference 

 of from five to fix thoufand leagues, in their win- 

 ter, and from two to three thoufand, at moft, in 

 their fummer. Thofe ices, by flowing alternately 

 into the bofom of the Seas, produce all their various 

 phenomena. If, in our fummer, there be two 

 tides a day in the Atlantic Ocean, it is becaufe of 

 the alternate divergent effufions of the two Conti- 

 nents, the old and the new, which approach to- 

 ward the North, whereof the one pours out by day, 

 and the other by night, the waters from the ice, 

 which the Sun melts on the Eaft and on the Weft 

 fide of the Pole he encompafiTes every day with his 

 fires, and thaws for fix months together If there be 

 a retardation of 22 minutes of one tide, from that 

 which fucceeds it, it is becaufe the cupola of the 

 polar ices, in fufion, daily diminifhes, and becaufe 

 it's effluxes are retarded by the finuofities of the 

 Atlantic channel. If, in our winter, there are like- 

 wife two tides, undergoing a daily retardation on 

 our coafts, it is becaufe the effluxes of the South 

 Pole, entering into the channel of the Atlantic, 

 likewife undergo two divergent impulfions at it's 

 mouth i the one in America, at Cape Horn, and 

 the other in Africa, at the Cape of Good- Hope. 



d 2 Thefe 



