on Hepatic Air. 141 
water it becomes very ofFenfive, refembling that of putrefying 
animal fubftances. 
To one meafure of hepatic air I added 1,5 of the nitrous 
folution of fiver: the air was immediately, without agitation, 
reduced to half a meafure, and the folution blackened. The 
remaining air admitted a candle to burn naturally. Hepatic air 
was alfo abforbed, but not fo readily, nor in fuch quantity, by 
the folution of vitriols of iron and fiver ; that of filver was 
blackened ; that of iron at firft became white, but by agita- 
tion darker. The refiduary air burned blue, as hepatic air 
ufually does. 
SECTION V. 
Of the 'Properties of Water faturatedwith Hepatic Air « 
This water turns tindture of litmus red. 
1 
It does not a fFedt lime-water. 
It does not form a cloud in the folution of marine, though 
it does in that of acetous baro-felenite. 
The folutions of other earths in the mineral acids are not 
altered by it. 
When dropped into a folution of vitriol of iron or marine 
fait of iron 9 it produces a white precipitate. 
In nitrous fait of copper it caufes a brown precipitate, and 
the liquor is changed from blue to green. The precipitate re- 
diffolves by agitation. In vitriol of copper it forms a black 
precipitate. 
The folution of tin in aqua regia is precipitated by it of a 
yeHowiih wb ; te colour ; that of gold 7 black; that of regains of 
antimony * 
