The bench-mounting apparatus consists of five long, transparent sedimentation columns mounted on a rigid frame. The columns are removable for filling before tests. A self-contained bench mounting apparatus for studies into the settling characteristics of suspended solids and the display of wall effects. A graduated scale on the rear panel allows students to measure settlement depth. The rear panel is translucent, with back lighting to improve observation of settling sediments in the columns. Supplied with the equipment is a stopwatch to find settling times, a specific gravity bottle, measuring beakers and five rubber bungs. The rubber bungs seal the ends of the columns when the students shake the liquid and particles before an experiment.