An experimental system was designed, constructed, and tested for the introduction of oxygen in the liquid state (LOX) into a body of water at 7 to 30C. The sorption of LOX, both by static water columns and by flowing water columns, was examined. Sorption efficiency and mass-transfer coefficients were calculated. Under experimental conditions investigated, these coefficients did not appear significantly different from those observed for gaseous oxygen. Water temperature, initial dissolved-oxygen concentration, and shear at the point of oxygen injection were less significant in affecting the mass-transfer coefficients than was gross water turbulence. The mass-transfer coefficients correlated with the corresponding Reynolds number.