antique scientific laboratory benchtop retort stand with two black enameled cast iron rings clamps, manufactured by the chicago apparatus co., chicago, il. retort stands are often used to support various glassware (e.g., beakers, tubes, flasks, etc.). the stand contains a black enameled cast iron weight base with beveled edge. the nickel-plated pole or rod is comprised of solid steel. fabricated by the fisher scientific co., pittsburgh, pa.