ADVERTISEMENT. XXXviî 



regularities of the phafes of the Moon ? Why there 

 are fome which rife at the quadratures, juft as at 

 the full and new Moons ? Wherefore are they al- 

 ways ftronger in proportion as you approach the 

 Poles, and frequently fet in towards the Line, con- 

 trary to the pretended principle of their impulfion ? 



Thcfe problems, which it is impoffible to folve 

 by the theory of the Moon's attradion at the Equa- 

 tor, are of eafy folution, on the hypothefis of the 

 alternate adion of the Sun's heat on the ices of the 

 two Poles. 



I am going, firfl:, to prove this diverfity of the 

 tides, even from the teftimony of Newton's compa- 

 triots, and zealous partifans of his fyftem. My 

 witneiTes are no obfcure men ; they are perfons of 

 fcience, naval officers of the King of Great Britain, 

 feledled, one after another, by the voice of their 

 Nation, and the appointment of their Prince, to 

 perform the tour of the Globe, and to derive from 

 their obfervaiions, information of importance to 

 the ftudy of Nature. They are men of no lefs 

 note than Captains Byron., Carteret^ Cooke, Clerke, 

 and the Aftronomer Mr. JVales. To thefe I (liall 

 fubjoin the teftimony of Nezvton himfelf. Let us, 

 firft of all examine what they relate refpeding the 

 tides of the fouthern part of the South Sea. 



In 



