Anahjfis of the Air. 
powdered Walton TjriteSy with only a cu- 
bick inch of compound Aqua forth into one, 
and a cubick inch of Water and compound 
Aqua fortis into the other : Upon weighing 
all the ingredients and veflels exaftly, both 
before and after the fermentation, I found 
the bolthead with compomidAqua- forth alone- 
had loft in fumes i dram 5 grains : But the 
other bolthead with Water and compound 
Aqua fortis, which fumed much more, had 
loft 7 drams, i fcruple, 7 grains, which is 
fix times as much as the other loft. 
Experiment XCVIII. 
A cubick inch of Newcajlle Coal pow- 
dered, and an equal quantity of compound 
Aquafortis poured on it, did in 3 days 
abforb 1 8 cubick inches of air 5 and in 3 
days more it remitted and generated 12 cu- 
bick inches of air 5 and on pouring warm 
water into the veffel x x (Fig. 34.) it re- 
mitted all that had been abforbed. 
Equal quantities of Brimftone and com- 
pound Aquafortis neither generated nor 
abforbed any air, notwithftanding hot 
ter was poured into the veffel x x. 
5 
A cu- 
