ti tyeat anD ColD* v 



EX PER. VIII. 



IN the firji Experiment we ob- 

 ferved, that upon the pouring of 

 water upon Sal Armoniac there en- 

 fued an intenfe degree of Cold, and 

 we have elfewhere recited^ that the 

 like effedt was produc'd by putting, 

 inftead of common water, Oyl of Vi- 

 triol to Sal Armoniac} but now 5 to 

 (hew further, what influence Motion 

 and Texture may have upon fuch 

 Trials, it may not be arnifs to adde 

 the following Experiment : To 

 twelve ounces of Sal Armoniac we 

 put by degrees an equal weight of 

 water , and whilft the Liquor was 

 diffolving the Salt, and by that a&i- 

 on producing a great Coldnefs 5 we 

 warily pour'd in twelve ounces alfo 

 of good Oyl of Vitriol 5 of which 

 new mixture the event was, that a 

 notable degree of Heat was quickly 

 produced in the Glafs wherein the 

 Ingredients were confounded, as un- 

 likely as it feemed, that, whereas 



each 



