{ 3(>S ) 



The rednefs of the iron was now lome- 

 what obfcured ; and 1 availed myfelf of the 

 circumftance to drop more water on it ; 

 but here the refult changed its appearance. 

 At the moment the water touched the me- 

 tal it began to boil, and an undulating 

 vapour arofe, with noife, which continued 

 till the entire difperfion of the liquor. The 

 heat of the iron continued fufficient for me 

 to repeat this experiment twice more with 

 the fame effed:. 



Copper in the furnace was complete!).' 

 fufed. I miade the fame experiments on it, 

 and with the fame circumftances as on the 

 iron. I omit defcribing the I'efults, as that 

 would only be to repeat exadtly what I 

 have faid relative to the former metal. 



To make the fame experiments on tin 

 and lead, the furnace was not neceflary, a 

 much lefs heat being fufEcient for the fu- 

 fion of thele metals. But I foon perceived 

 that the confidence with which I had made 

 my trials on Ae iron and copper, mull 



not 



