refpeSlhig the Caafe of the Tuits.. 1 4.3 



the day tides, and thofe which happen two^or three days after 

 the full and change. The night tides rife nearly two feet 

 higher. — Cook, April 1778. Thefe femidiurnal tides differ 

 from ours in taking place at the fame hour, and exhibiting no 

 fenfible rile till the lecond or third day after the full moon: 

 all which is perfectly inexplicable on the lunar hypothefis. 



Thefe northern tides of the South fea, remarked in April, 

 become, in higher latitudes, Wronger in May, and ftill ftronger 

 in June ; which cannot be referred to the moon's courfe then 

 paffing into the fouthern hemifphere, but mud be afcribed 

 to the fun's courfe paffing into the northern hemifphere, and 

 proceeding, as its heat incrcafes, to fufe the ices of the north 

 pole : befides, the direction of thefe northern tides toward* 

 the line constitutes a complete confirmation that they derive 

 their origin from the pole. 



At the entrance of Cook's River there was a ftrong tide 

 fetting out of the inlet at the rate of three or four knots an 

 hour: higher up in the inlet, at a place four leagues broad, 

 the tide ran with prodigious violence at the rate of five knots 

 an hour. Here the marks of a river difplayed thernfelves, 

 the water proving considerably frefher. — Cook, May 1778. 



What Cook calls a river, is nothing but a real northern 

 fluice, through which the polar effu lions are difcharged into 

 the ocean. Middleton {Voyage to Hud/on $ Bay, 1 741 and 

 1742) found, between lat. 65 and 66°, a conliderable inlet 

 running weft, which he calls Wager's River ; and, after 

 repeated trials of the tides for three weeks, found the flood 

 conftarrtly coming from the eaft. This is another of the 

 northern fluiees. 



In Karakakooa Bay, Sandwich Iflands, the tides are very 

 regular, ebbing and flowing fix hours each alternately. — 

 Clef he, March 1779. 



At the town of St. Peter and Paul, in Kamfchatka, the 

 tides are very regular every twelve hours. — Clerhe, Oil. 1779. 

 Mr. Wales {Introduilion to Cook's lajl Voyage) acknow- 

 ledges that the tides obferved in the middle of the great 

 Pacific ocean fall fliort full two-thirds of what might have 

 been expected from calculation. 



Tiie courfe of the tides towards the equator in the South 



fea; 



