96 Of tlje ggtec&am'r al dDpgine 



EXPER. XXV. 



WE have given feveral , and 

 might have given many 

 more, Inftances of the Incalefcence 

 of Mixtures, wherein both the Ingre- 

 dients were Liquors, or at leaft one 

 of them was a fluid body. But 

 fomttlmts Heat may alfo be pro- 

 duc'd by the mixture of two pow- 

 ders } fince it has been cbferved in 

 the preparation of the Butter or Oyl 

 of Antimony , that , if a fufficient 

 quantity of beaten Sublimate be ve- 

 ry well mingled with powder'd Anti- 

 mony, the mixture, after it has for a 

 competent time ( which varies mucH 

 according to circumftances as the 

 weather, veiTel, place. Sec. wherein 

 the Experiment is made ) ftood in 

 the air, would fometimes grow ma- 

 nifeftly hot and now and then fo 

 intenfely fo 5 as to fend forth copious 

 and fetid fumes almoft as if it would 

 take fire. There is another Expe- 

 riment 



