1 ADVERTISEMENT. 



" might have been expedled from theory and cal- 

 ** culation." 



The partifans of the Newtonian fyftem would 

 find themfelves reduced to very great embarraff- 

 ment, were they called upon to explain, in a fatis- 

 fying manner, firft, Why there are, daily, two 

 tides of fix hours, in the Atlantic Ocean? then. 

 Why there is but one of twelve hours, in the fou- 

 thern part of the South Sea, as at the ifland of 

 Taïti, on the coaft of New Holland, on that of 

 New Britain, at the ifland of Maflafuero, &c. ? 

 Why, on the other hand, in the northern part of 

 that very fame South Sea, the two tides of fix hours 

 re-appear every day equal, at the Sandwich iilands; 

 unequal on the coaft of America, at the entrance of 

 Nootka ; and toward the fame Latitude, reduced 

 to a fingle tide of twelve hours, on the coaft of 

 Afia, at Kamchatka ? 



I could quote odiers ftill more extraordinary. 

 On account of thofeftrongly marked, and very nu- 

 merous diflbnances, of the courfe of the tides, with 

 that of the Moon, with a fmall number of which 

 only, however, Nezvton was acquainted, he himfelf 

 was conftrained to admit, as I have mentioned in 

 another place, *' that there muft be, in the perio- 

 " dical return of the tides, fome other mixt caufe, 



" hitherto 



