On rendering Taper hideflruclible ly Tire. *)\ 



when continued in the fire it became reduced to afhes like 

 common paper, on account of the muriate which was de- 

 ftroyed by the heat. This paper, then, is in nothing different 

 from common paper. 



No. IX. Taper dipped in fulphite of magnefia. — Paper dip- 

 ped in fulphite of magnefia acquired more confiftence and 

 more toughnefs than it had before. When held in a flame it 

 took fire, and was converted into a friable coal of an afh grey 

 colour ; when it was however held longer in the fire, it was 

 converted into fome grains of a very white colour, which, by 

 the chemical tcft, I difcovered to be fulphure of magnefia. 



No. X. Taper dipped in fulphite of alumine % — Paper dip- 

 ped in diffolved fulphite of alumine, in which it was kept 

 fome time before it was dried, fuffered no vifible change, ex- 

 cept that it was a little harder. When burnt, there re- 

 mained a very black coal, which was more friable than that 

 obtained from paper dipped in liquor of flints. 



No. XT. Taper dipped in fulphite of foda. — Paper dipped 

 in fulphite of foda {hewed no vifible change. On the fire it 

 was converted into a very bright coal, which was deftroyed 

 by the flame of a candle. It became glowing, puffed itfelf 

 up, and was totally changed into fulphure of foda, which 

 with fome acids had the fmcll of rotten eggs. 



No. XII. Taper dipped in fulphite of potaflj. — Some leaves 

 of paper which had been dipped in diffolved fulphite of pot- 

 aih, imbibed this fait exceedingly well ; but it afterwards 

 burnt in the fire, and was converted to a black coal, which 

 foon after glowed, and was then totally deftroyed. It how- 

 ever afterwards collected itfelf in fmall particles of fulphure 

 of potafh. 



No. XIII. Taper dipped in fulphite of ammoniac. — Paper 

 dipped in this fait affumed, after being dried in the fun, the 

 moiftnefs of the atniofphere. When burnt, the refiduum 

 was a black finning friable coal, which became afterwards 

 annihilated like the former. 



No. XIV. 



