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It is fuppofed by many, that there are lands 

 to the northward of the great mother of feas^ 

 •the Pacific Ocean, and that they connect the 

 weftern parts of North America with the eaftern 

 limits of Tartary. Thefe lands cannot conveni- 

 ently breed any birds but fuch as inhabit them 

 all the year ; becaufe there are no lands to the 

 fou th ward of them for birds of pafifage to pafs 

 unto : fo that, if there be any, they muft make 

 long journeys to the eaft or weft, before they 

 can find land more fouth, and in a warmer lati- 

 tude than what they muft leave behind them. 

 I think it reafonable to believe, that many birds, 

 which are conftant inhabitants of warm coun- 

 tries, pafs from one warm country to another, 

 on account of the great rains which fall very 

 heavily at certain feafons of the year, and con- 

 tinue without intermiiïion for feveral months to- 

 gether ; while countries very near, perhaps fepa- 

 rated only by a ridge of mountains, enjoy a dry 

 ferene feafon. Numberlefs fuch inftances are 

 given by voyagers : lb that birds may eafily take 

 the advantage of it ^ for it is not eafy to conceive 



how 



