of IFire by Zi' fining. 
225 
POSTSCRIPT. 
Being deflrous of knowing whether the lightning had any 
ways altered the property of the iron by melting it into 
globules, I applied to the hon. Mr. cavendish, who very 
obligingly tried them with different acids, and found that they 
lcarcely (hewed any figns of effcrvefcence even when heated 
over the fire. He next tried home iron filings, which he put 
to fome of the fame acid ; thele not only caufed an effervef- 
cence, but were intirely difl'olved. 
He alio tried the pieces of Reel ftruck off by {hiking a light, 
which being feparated bv a magnet from the pieces of flint ef- 
fervefced with the fame acids, and difl'olved almofl: intirely, 
only half a grain being left out of eighteen, and thele confided 
principally of thofe parts that were melted in globules. 
Vol. LXXIIL 
