120 Mr. cavendish’s Account of 
quantity of common air, it is more completely deprived of its 
phlogifton, and is abforbed by the water in a more dephlogifti- 
cated {late than when a fmall quantity of common air comes in 
contadt with a large quantity of nitrous ; confequently, in the 
fecond method, where fmall portions of nitrous air come in 
contact with a large quantity of common air, the nitrous air 
is more deprived of its phlogifton, and therefore a lets quantity 
of it is required to phlogifticate the common air than in the 
firit method, where fmall portions of common air come in con- 
ta£t with a large quantity of nitrous air ; fo that a lefs quan- 
tity of the nitrous air is abforbed in the lecond method than in 
the firfd. As to the common air, as it is completely phlogifdi- 
cated in both methods, it mold likely fuffers an equal diminu- 
tion in both. 
A clear proof that a lefs quantity of nitrous is required to 
phlogifticate a given quantity of common air in the fecond 
method than in the firft, is, that if common air is mixed with 
a quantity of nitrous air not fufficient to completely phlogifti- 
cate it, the mixture v T ill be more phlogifticated if the nitrous 
air is added flowly to the common, as in the fecond method, 
than if the common air is added to the nitrous ; and if the ni- 
trous air is added flowly to the common, without being in con- 
tact with water, the mixture will be found to be ftill more 
phlogifticated than in the fecond method, where the two airs 
are in eontadl with water at the time of mixing. 
The following table contains the refult of the experiments I 
have made on this fuhjedd. 
Firft 
