Cn.vr. Xlll.] TIIIC TIDES. ^ 153 



towards the west and south along the coast of Brazil, 

 from near Pernambiico to the vicmity of the River 

 Plate,' and also of ' the almost uniformity of the 

 time of high water along that extent of the coast of 

 Africa which reaches from near the Cape of Good 

 Hope to the neighbourhood of the Congo.' ^ The 

 former we have already mentioned, as indicating 

 the equatorial tide moving westwards and then turned 

 southwards by the coast ; the latter accords with the 

 tide rolling eastwards in the temperate zone. 



' Against the supposition that a tide-wave travels 

 along the west coast of America, from south to north, 

 are the facts — that the flood-tide impinges upon 

 Chil6e and the adjacent outer coast, from the south- 

 ward of west ; that it is high water at Cape Pillar 

 and at Chil6e, including the intermediate coast, 

 almost at one time ; that from Valdivia to the Bay 

 of Mexilones (differing 18° in latitude), there is not 

 an hour's difference in the time of high water ; that 

 from Arica to Payta the times vary gradually as the 

 coast trends westward ; that from Panama to Cali- 

 fornia the times also change gradually as the coast 

 trends westward ; and that from 40° to 60° N. high 

 water takes place at one time.' ^ These facts accord 

 with the tides rollino; eastwards throuo^h both of the 

 temperate zones of the Pacific. 



' In 50° N. it is high water at Vancouver's Island 

 at 9'\ and at the south extreme of Kamtschatka it 

 1 P. 371. 2 p_ 37i_ 



