[ 4^9 3 



degree of the north latitude, more or lefs according to the fun's 

 declination, p. 126. 



Various obfervations tend to juftify both thefe ratios, when, 

 applied to different latitudes, but neither of them apply within . 

 certain other latitudes. 



The following table exhibits, as far as I can colled, the 

 mean heat of the correfponding latitudes of each hemifphere at 

 fea, during the fummer months of each, extradted as to the 

 fouthern hemifphere,, from, the journals of Cooke, La Peyroufe, , 

 Dalrymple and Marchand ; in low latitudes the winter months 

 alfo. 



SOUTHERN. 



