Laboratory mixing box experiments were undertaken to examine turbulent mixing and fractal structure at a density interface in a stably stratified two-component fluid(fresh on salt), subjected to shear-free turbulence induced by an oscillating grid within the salt water layer. The density interface was visualized by adding fluorescein and dye into the salt water layer. A total of 12 runs were made. Measurements were made of(a) the height of the mean density interface above the bottom of the mixing box;(b) th...