Dr. Holyoke's Estimate of iJie Excess of Heat and Cold, 



S3 



All 



coasts, which border upon a large ocean^ in 



cold cli- 



mates^ mustj during the season of winter, be warmed by winds 



r 



which blow from the ocean upon them ; plainly for this 



that the waters of 



sea in those latitudes never 



become so cold by many degrees, as the surface of the earth : 

 so likewise^ in those same regions, the water of the sea never 



d 



the 



becomes, auring tne summer, so warm as 



the earth's sur- 



face ; and therefore, at this season, winds blowing from the 



sea upon the land^ cool the air. 



NoW; it appears by 



the Ephemeridos Meteorologicn3 Pa- 



latini;, that the winds, which are most prevalent in Europe, 

 blow from the West, or at least from that semicircle of the 



horizon ; more especially during the summer 



and winter 



months. Westerly winds then, must cause the air of Europe 

 to be warmer in winter, and colder in summer, than those 

 that blow from the opposite quarter; 



because that continent 



lies eastward of the great Atlantick ocean. 



The directly 



opposite efFect takes pi 

 cause ; that is to say, 



th America, from the 



hich 



pre\' 



most with 



ticularly 



the western 



hot and cold 

 for in the vei 



fi 



nal and autumnal 



I 



they 



are 



nly more 



d blow more frequent 



fr 



the eastward, than in summer or winter* We 

 feel less of the warming effects of the sea air in 



winter, as well as less of 



cooling ones in summer; be- 



cause 



• 



an: 



several years, I do not find more than one month In sixteen or eighteen, in ^vhiuh easterly 

 ^dnds predominate; but I find seven or eight in a year upon an average, in which they 

 blow almost constantly from the westward. 



