two nearly identical oversized early 20th century salvaged chicago university laboratory retort stand with adjustable ring clamps

two nearly identical oversized early 20th century american scientific laboratory retort stands with adjistable rings. the stands were executed by the fisher scientific company, chicago, ills. the weighted bases are comprised of cast iron affixed to steel rods. the adjustable rings or clamps are in great overall condition. the salvaged chicago lab stands are priced for the pair.