i> eae J 
Nitrous acid difengages alfo the 
phiogifton from the iron, but does 
not allow it to pafs in the air difen- 
gaged from it, fo as to make it in- 
flammable. . It feems to keep this 
phiogifton to itfelf; for it is, after 
the folution, no more to be found 
_4n the diffolyed iron, when precipi- 
fated in the form of ochre; but the 
dame fpirit of nitre, when diffolvi ing 
iron in a very. diluted ftate, leaves 
the moft part of the phlogifton with 
the metal, and rifes in the form of 
partly fixed air, common air, and 
what is called phlogifticated air, as 
was faid above ; and by this method 
iron may be rediutetl to the moft 
mipalpable powder, all obedient to 
ae Magnet, which is a method of 
making Aithiops Martialis of great 
importance for medical ufes, and 
was s difcavered by an apothecary of 
Paris. 
