of $eat ant) CelD* 83 



EXPER. XVI. 



THofe Chymifts, who conceive 

 that all the Incalefcencies of 

 bodies upon their being mixt, pro- 

 ceed from their antipathy or hoftili- 

 ty 5 will not perhaps expeft, that the 

 parts of the fame body, (either nu- 

 taerically, or mfpecie, as the Schools 

 phrafeit, ) (hould^ and that without 

 manifeft conflift , grow very hot to- 

 gether. And yet having for trials 

 fake put two ounces of Colcothar fo 

 ftrongly calciad 3 that it was burnt 

 almoft to blacknefi, into a Retort>we 

 poured upon it two ounces of ftrong 

 Oyl of Englifh Vitriol, and found, 

 that after about a minute of an hour 

 they began to grow fo hot 5 that I 

 could not endure to hold my hand 

 to the bottom of the Veffel D to 

 which the mixture gave a heat, that 

 continued fenfible pn theoutfide for 

 between twenty and thirty minutes. 



EX^ 



