[ #69] 
with the number 8 upon the fcale, 
and if above this mark are remain- 
ing three entire divifions of 100 
partitions each of the column of air, 
the quantity of air exifting in the 
tube amounts to 308 {ub-divifions, 
which being fubtracted from the 5. 
meafures of both airs employed, 
or from the 500 fub-divifions of 
both airs, the remainder will be 
192, which is the exact number of 
the parts or afore of the two 
airs deftroyed. aR Ee Sepeteceens 
If the air to be eanfned is Ag 
phlogifticated air, he continues let- 
ting up one meafure of nitrous air 
‘after another in the manner menti- 
oned, till no more diminution takes 
place. Six, feven, and fometimes 
eight meafures. of nitrous air are | 
required to faturate two meafu 
