of fceat anb dolD. &3 



that not onely 'twas a great deal too 

 hot tobelafely touched, but proba- 

 bly would, according to my defign, 

 have kindled Gunpowder , if that 

 which I was fain to make ufe of had 

 been of the beft fort: For, to the 

 wonder of the by-ftanders , the iron 

 kindled the Sulphur of many of the 

 grains of the corns of powder , and 

 made them turn blue, though I do 

 not well remember, that it made any 

 of them go off. 



EX PER. VIII. 



B Elides the effects of manifeft and 

 violent Percuffions , fuch as 

 thofe we have been taking notice of 

 to be made with a hammer, there are 

 among Phanomem obvious enough, 

 fome that (hew the Prod uciblenefs of 

 Heat even in cold iron , by caufing 

 an inteftine commotion of its parts : 

 For we find, that 3 if a piece of iron 

 of a convenient ftiape and bulk be 

 nimbly filed with a large rough File, 

 E 3 a 



