[ S; ] 



CHAP. IL 



Tj^Y good friend, the late Mr. Mark Catelby, 

 I remember, fometime before his death, 

 prefented a paper to the Royal Society, relating 

 to the paffage of birds, which was read at one 

 of their meetings. This paper I have not by 

 me, but well remember the general opinion ad- 

 vanced in it was, that he imagined fuch birds as 

 were inhabitants with us only part of the year, 

 departed from hence to inhabit fouthern coun- 

 tries on the other fide of the Equinodlial Line, 

 juft of the fame degree of latitude with thofe 

 they departed from on the northern fide : fuch a 

 conje6lure, at firft: fight, feems to be probable 

 enough ; becaufe, in general, it is fuppofed, that 

 during our winter feafon, the temperature of the 

 weather, in the fouthern latitudes, is nearly the 

 fame as it is with us in our fummer ; and then 

 of confequence a bird of paffage, that pafles from 

 fixty degrees of northern, to fixty degrees of 

 fouthern latitude, will meet not only with the 



fame 



