[ 242 ] 



more was abforbed. The remainder was inflammable, 

 and burned with a blue flame. 



Nowithftanding the affinity which this vapour of 

 fpirit of fait appears to have with phlogifron, it is not 

 capable of depriving all bodies of it. I found that 

 dry wood, crufts of bread, and raw fle(h, very 

 readily imbibed this acid vapour, but did not part 

 with any of their phlogifton to it. All thefe Jub- 

 ilances turned very brown, after they had been fome 

 time expofed to this vapour, and tailed very ftrongly 

 of the acid when they were taken out ; but the flefh, 

 when warned in water, became very white, and the 

 fibres eafily feparated from one another, even more 

 than they would have done if it had been boiled or 

 roafted. 



When I put a piece of faltpetre to this vapour, it 

 was prefently furrounded with a white fume, which 

 ibon filled the whole vefTel, exactly like the fum3 

 which burfts from the bubbles of nitrous air, when 

 it is generated by a vigorous fermentation, and fuch 

 as is feen when nitrous air is mixed with this vapour 

 of fpirit of fait. In about a minute, the whole quan- 

 tity of vapour was abforbed, except a very final 1 quan«r 

 tity, which might be the common air that had 

 lodged upon the furface of the fpirit of fait within 

 the phial. 



A piece of alum expofed to this vapour turned yel- 

 low, abforbed it as fait as the faltpetre had done, and 

 was reduced by it to the form of a powder. The 

 furface both of the nitre and alum was, I doubt notj. 

 changed into common fait, by this procefs. Common 

 fait, as might be expected, had no effect whatever on 

 this vapour* 



Erom , 



