. [ 413 ] 



'On this table we may remark, lo. That though the mathema- 

 tical temperature of the autumnal equinox be exaflly the fame 

 ■as that of the vernal, yet the real is much higher, of the 

 hemifphere being cooled during the winter is flowly heated, and 

 bein^ heated during the fummer is flowly cooled. 



zdo. That in confequence of this circumftance, the real tem- 

 perature of the autumnal equinox approaches much nearer to the 

 aftronomical than does that of the vernal, until we arrive at lati- 

 tude 70"^ and the higher latitudes. 



3tio. In all latitudes above the equator a cold approaching to 

 the aftronomical is fcarce ever felt at fea in winter ; to what can 

 this be attributed but to the equatorial effluence ? For other caufes, 

 viz. evaporation, and the frequent intervention of clouds, or at 

 leafl: haze, intercept the fun's rays, and confequently fliould cool 

 the air even below the aftronomical ratio which fuppofes the inci- 

 dence of all the rays ; in latitudes above 20*^ the difference is 

 enormous. 



4to. At the diftance of fome hundred miles from the coafls of 



, the Atlantic>^n latitudes above 40*^, the cold is much more mo- 



' derate than the mathematical ratios indicate, in moft years ; owing 



I to the above-mentioned caufe, and to the reign of wefterly and 



•Vol. VIII. 3 F foutherly 



