C 49 3 



Article V. 



An Account of Glauber's Salty extraEled from the Rub^ 

 bifh of an old Furnace. 



[By the Rev. George Swayne, Pucklechurchl] 



SINCE a perufal of Dr. Watfon's very elegant 

 Eflays on Chemiftry, my curiofity has led me 

 to examine feveral matters with an eye of an^Jyti- 

 cal enquiry, which before had fcarce attraded a 

 fupcrficial notice. 



Among thefe, as I was one day looking round 

 a fteam-engine which has long been eredled at the 

 coal-works in this neighbourhood, I perceived the 

 bricks and mortar furrounding the furnace to be 

 very fully impregnated with a fubftance which from 

 its appearance I judged to be faline. From the 

 circumftance of the above-mentioned ingenious 

 author extradling a true nitre from the mortar of an 

 old barn, it immediately occurred to me, that this 

 fubftance could be no other than fuch nitre, par- 

 ticularly as it appeared in many places already cryf- 

 tallized. Workmen were at that time removing 

 the furnace, which was in a flate of decay, in order 

 to fubftitute a new one in its place. I took home 

 with me a fmall quantity of the rubbifli, and ex- 

 amined it by the ufual analyfis. The quantity ex- 



Vol. III. E animed 



