88 ©f tty ^ec^antcal fttgtne 



EXPER. XIX. 



Experienced Chymiftswill eafily 

 believe^ that 'twere not diffi- 

 cult to multiply Inftances of Heat 

 producible by Oyl of Vitriol upori 

 folid bodies 5 efpecially Mineral 

 ones. For 'tis known D that in the 

 ufual preparation of Vtiriolum Mar* 

 ti$) there is a great effervefcence ex- 

 cited upon the afFufion of the Oyl of 

 Vitriol upon Filings of Steely efpe- 

 cially if they be well drenched in 

 common water. And it will fcarce 

 be doubted, but that, as Oyl of Vi- 

 triol will (at leaft partly) diflblve 

 a great many both calcin'd and tefta- 

 ceous bodies ^ as I have try'd with 

 Lime, Oyfter-fhells, &c. fo it will/ 

 during the diffolution, grow fenfi- 

 bly, if oot intenfely hot with them/ 

 as I found it to do both with thdfe 

 newly named, and others,, as Chalk, 

 Lapis Calaminam^ &c. with the laft 

 of which, if the Liquor be ftrongy 

 it will heat exceedingly,, 



EX- 



