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Collier's New Encyclopedia (1921)/Huso

HUSO, Acipenser huso, the Beluga or isinglass sturgeon. It is sometimes 12 or 15 feet long, and weighs 1,200 pounds. One mentioned by Cuvier reached 3,000 pounds. It inhabits the great rivers falling into the Black and Caspian seas. The best isinglass is made from its air-bladder.