presently preferred methods of practicing the same, in which: FIG. 1 is a schematic of a method for dewaterizing an aqueous slurry of fine solid particles from a coal treatment underflow; FIG. 2 is an enlarged fragmentary portion of FIG. 1; FIG. 3 is a cross-sectional view taken along line III--III of FIG. 1; FIG. 4 is a schematic of a second, alternative method for dewaterizing an aqueous slurry