200 



it is the purest Same, leaving neither soot nor ashes after 

 its t;ifl<urrtttion. 



1 . Wind is a current of air. Wherever the air is 

 rareiiert or condensed beyond its natural degree, a wind 

 must necessarily ti/sue, till the equilibrium be restored : 

 the condensed .tir immediately expanding itself toward 

 that which v.as rarefied. The causes of this condensa- 

 tion or ruitiYactioii, are heat, cold, and a thousand things 

 beside. 



The heat in the West-India islands would be intoler- 

 able, if the winds rising as the sun gathers strength, did 

 not blow from the sea, so as to temper the heal even of 

 the iH>on-day sun. On the other hand, as the night 

 advances, a breeze arises from the land, and blows as 

 from its centre towards the sea, to all points of the 

 compass at once. 



At Aleppo the coldest winds in the winter are those 

 \vbich blow from N. W. to E. the nearer I he east I he 

 cukier. But from May 1, to the end of Septen her, the 

 winds bio-wing from the same points, bring with them a 

 heat which one would imagine came out of aa oven, and 

 v hich, when it blows hard, will affect metals within the 

 houses, as if they had been exposed to the rays of the 

 sun. Yet it is remarkable, that water kept in jars is 

 much cooler 'at this time, than when a cool \\ esterl y 

 wind blows. 



But what degree of heat can a human body bear ? A 

 gentleman desirous to ascertain this, heated several 

 rooms by means of flues, from 100 degre^ f i Fahren- 

 heit's thermometer to 210. He found he could bear the 

 heat of 210 without suffering much, and could breathe 

 freely, when his pulse beat 165 beats in a minute. Even 

 then placing the ball of the thermometer under his 

 tongue, the glass sunk to 100, and the flesh of his body 

 felt as cold as a corpse. Yet his watch chain was so 

 hot, he could scarce touch it. 



Mince be inferred that a human body has, to a cer~ 



