Analyfis of the Air . 30 j 
commodes the lungs, yet it will not fuf- 
focate like that of Charcoal, which is with- 
al more fulphureous, without any mixture 
of watry vapours. 
And that new generated elaftick air is re- 
forbed by thefe fumes, I found by attempting 
to fire a Match of Brimftone with a burn- 
ing glafs, by means of a pretty large piece 
of Brown Paper which had been dipped 
in a ftrong folution of Nitre, and then 
dryed : Which Nitre in detonizing generated 
near two quarts of air, which quantity of air, 
and a great deal more, was abforbed, when 
the Brimftone took fire and flam’d vigoroufly. 
So that the 8 5 cubick inches of air, Experi- 
ment 9 6, which I found upon meafuring was 
abforbed by the Walton mineral and com- 
pound Aquafortis , was the excefs of what 
was abforbed by thofe fumes above what 
was generated by the fermenting mixture. 
And the reafon is the fame in filings of 
Iron and Spirit of Nitre, Experiment 94, 
which alfo abforbed more than they gene- 
rated, whether with or without water. 
Hence alfo we fee the reafon why filings 
of Iron and compound Aquafortis in the 
fame 94 Experiment abforbed air 5 and why 
when mixed with an equal quantity of water 
X it 
