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The bench-mounting apparatus consists of five long, transparent sedimentation columns
mounted on a rigid frame. The rear panel is translucent, with back lighting to improve
observation of settling sediments in the columns. The columns are removable for filling
before tests. A graduated scale on the rear panel allows students to measure settlement
depth. 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 (slurry) before an experiment.