of tym an& ColD* 45 



(hall rather chufe to mention fome 

 few Inftances not fo notorious as the 

 former, but not unfit by their variety 

 toexemplifie feveral of the differing 

 ways of exciting Heat. 



And yet I (hall not decline the 

 mention of the moft obvious and fa- 

 miliar Inftance of all, namely the 

 Heat obferved in Quick-lime ijpon 

 the affufion of cold water , becaufe 

 among learned men, and efpecially 

 Peripateticks , I find caufes to be a£ 

 fign'd that are either juftly queftion- 

 able or manifeftly erroneous. For 

 as to what is inculcated by the 

 Schools about the Incalefcence of a 

 mixture of Quick-lime and water by 

 vertue of a fuppofed antiperijiajit or 

 Invigoration of the internal Heat of 

 the Lime by its being invironed by 

 cold water, I have elfewhere (hewn, 

 that this is but an Imaginary Caufe^ 

 by delivering upon Experiment 

 C which any man may eafily make} 

 that, if inftead of cold water the li- 

 quor be poured on very hot, the e* 

 bullitfon of the Lime wiH not be the 

 D 2 iefe, 



