STUDY IV. 



179 



nothing with certainty refpeding the flux and re- 

 flux of the Tides. Let this be carefully remarked. 



Henry Ellis obferved with aflonifhment, in his 

 voyage to Hudfon's-Bay, in 1746, and 1747, that 

 the Tides there came from the North, and that 

 they were accelerated, inftead of being retarded, 

 in proportion as the Latitude increafed. He af- 

 fures us that thefe efFecfts, fo contrary to their ef- 

 fedis on our coafts, where they come from the 

 South, demonftrate that the Tides, in thofe high 

 Latitudes, do not come from the Line, nor from 

 the Atlantic Ocean. He afcribes them to a pre- 

 tended communication between Hudfon's-Bay 

 and the South-Sea: a communication which, with 

 much ardor, he fought for, and which was, indeed, 

 the objeâ; of his voyage ; but now we have com- 

 plete affurance that it does not exift, from the fruit- 

 lefs attempts lately made by Captain Cook to find it 

 by the South-Sea, to the north of California, in 

 conformity to the advice, long before given re- 

 fpeding it, by the illuftrious Navigator Dampier, 

 whofe fagacity and obfervations have, by the by, 

 greatly aflifted Captain Cook in all his difcoveries. 



Ellis farther obferved, that the courfe of thefe 

 northern Tides of America, was fo violent, at /F^- 

 ^fr'j Strait, which is about 65^ 37' North Lati- 

 tude, that it run at the rate of from eight to ten 

 N 2 leagues 



