I 
on Hepatic Air* igt 
Water impregnated with phofphoric air, and over which this 
air had burned, {lightly reddened tin&ure of litmus :■ 
Did not affeft Pruffian alkali : 
Had no effeffc on the nitrous folutions of copper or lead, zinc 
or cobalt,, nor on marine folution of iron or tin, or of tin in 
aqua regia, nor on the vitriolic folutions of iron , copper , tin , 
lead, zinc, regulus of antimony, arfemc, or manganefe % nor on 
the marine folutions: of iron, copper , lead, zinc , cohalt , arfenic f 
or manganefe . 
But it precipitated the nitrous folution of fiver black, and 
vitriol of lilver brown ; alfo nitrous folution of mercury made 
without heat brown and black ; but vitriol of mercury firffe 
became reddifh, and afterwards white ; and fublimate corrofive 
yellow and red mixed with white. 
Gold diffolved in aqua regia is precipitated purplilh black, 
and from the vitriolic acid brownilh red and black ; but regulus 
of antimony in aqua regia is precipitated white by this phof- 
phorated water. 
The nitrous folution of bifmuth fliewed 'firft a white, and 
prefently after a brown precipitate. Vitriol of bifmuth and 
marine lalt of bifmuth were alfo precipitated brown ; this latter 
re-diffolved by agitation. 
The nitrous folution of arfenic alfo became brown, but re-^ 
diffolved by agitation. 
I afterwards impregnated fome water with this air, without 
fuffering the air to burn over it: it fcarcely affedted litmus*, 
did not precipitate lime-water ; but it caufed a black precipitate 
in folution of f iver, a white precipitate of regulus of antimony^ 
in JR. , and a whitilh yellow in that of fublimate corrof ve . 
To a meafure of this air I let up a meafure of water, and 
through this fome fmaU bubbles of common air % every bubble 
flamed 
