44 2Dftt)e^et^anttal Engine 



Heat , and many Experiments may 

 be reduc'd to almoft each of them^ 

 chance it felf having in the Labora* 

 tories of Chymifts afforded divers 

 Fhtinomena rekrrable to one or other 

 of thofe Heads. Many of the more 

 familiar Inftances, applicable to our 

 prefent purpofe, have been long 

 fince colle&ed by our juftly famous 

 VeruUm in his fhort , but excellent^ 

 Paper de forma calidi , wherein 

 (though I do not acquiefce in every 

 thing I meet with there ) he feems 

 to have been, at leaft among the Mo- 

 derns, the Perfon that has firft hand- 

 led the Do&rineof Heat like an Ex* 

 peritnentall Philofopher. I (hall 

 therefore decline accumulating a 

 multitude of Inftances of the Pro- 

 duction of Heat* and I (hall alfo for- 

 bear to infift on fuch known things, 

 as the Incalefcence obfervable upon 

 the pouring either of Oyl of Vitriol 

 upon Salt of Tartar, ( in the making 

 of Tart arum Vitriohtum ) or oiAqua 

 fortk upon Silver or Quickfilver, (in 

 thediilblutionof thefe Metals) but 



(hail 



