[- 246° ] 
water much impregnated with fixed 
air difturbs the natural operation of 
the leaves in yielding dephlogifti- 
cated air, and that the air thus 
obtained was chiefly the fixed air 
, from the water, and fome little 
quantity of air, which is fometimes 
better than common air, but for 
the moft part much worfe. 
SEC- 
