Rotation apparatus, of unknown function and probably incomplete, comprising wooden base with crank handle and hidden cord drive to a vertical spindle, one ebonite (?) disc for fitting at base of spindle, seven black-painted glass discs with circular wave patterns incised in the paint, one glass disc with the remnants of 'smoking' on it, and one clear glass disc, all in a deal box fitted with twelve slots for discs and an oversized compartment for the base unit.