on Hepatic Air, ' 1^5 
purified nitrous air to the mercurial tub. It appeared to lofe, 
by privation of its acid, about one-fixth of its bulk ; and it was 
diminiflied by common air juft in the fame manner as unpu- 
rified nitrous air is. 
Then to 8 cubic inches of this purified nitrous air I admitted 
all at once 7 cubic inches of hepatic air. No cloud, diminu- 
tion, or depofit, appeared ; but in fix hours after (the tempera- 
ture of the room being all the time at 76°), the whole was 
reduced to 5 cubic inches ; the diminution went no further 
eighteen hours after. Sulphur, much whiter than in the for- 
mer experiments, was depofited, and both in this and in the 
former experiments that part of it which, by the rifing of the 
mercury, was intercepted between it and the jar, was of a 
yellow and red ftiining colour, and not black as that depofited 
on mercury ufually is. The refiduary air flafhed with fo much 
vehemence as to extinguifli the candle dipped into it, by the vio- 
lence of the blaft. The flame was exceeding white and vivid 1 
but it did not detonate in the leaft, but rather refembled de- 
- phlogifticated air. The jar out of which it had been transferred 
had a fharp alkaline fmell. 
This air was not in the leaft diminiflied by nitrous air, even 
when heated to 1 50 degrees ; which heat I contrived to produce 
by paffing the upper part of the jar that contained this air 
into another wider jar, furniflied with a perforated cork bottom, 
and filling this with water heated to that degree. 
Water poured into the jar in which the fulphur was depo- 
fited, produced a bluifh white cloud in folution of filver, 
though infipid to the tafte. 
Hence it appears to me, that, whatever this air may be, it 
had been deacidified by hepatic air ftill more perfectly than 
that 
