Gilbert "Cloud Chamber": Circular steel base supported by three steel stands; a glass bulb sits on a black-coated steel stand; a red-coated wire is attached to the top of the bulb with a rubber stopper and connects to the deionizer; on both sides of the bulb, in a triangular formation, are two steel stands that support cylindrical compartments; inside the compartments are the tops of the steel stands; yellow- and black-coated wires come out of the closed end of the compartments and attach to the deionizer; the deionizer is an egg-shaped steel object with a flat steel base; it has wires emanating from both sides, a steel push button on top, and an electrical chord coming from its left side; a rubber hand pump can be attached can be connected to the glass bulb/chamber underneath the base. On base: "GILBERT / CLOUD CHAMBER" From product catalogue description:

"Produces awe-inspiring sights! Enables you to actually SEE the paths of electrons and alpha particles traveling at speeds of more than 10,000 miles per SECOND! Electrons racing at fantastic velocities produce delicate, intricate paths of electrical condensation--beautiful to watch. Viewing Cloud Chamber action is closest man has come to watching the Atom! Assembly kit (Chamber can be put together in a few minutes) includes Dri-Electric Power Pack, Deionizer, Compression Bulb, Glass Viewing Chamber, Tubing, power leads, Stand and Legs.