Bogardus, James. Born in 1800. American inventor of great fecundity, who worked for some time as a watchmaker and engraver in New York. Among his inventions were the ring-flyer for cotton spinning, 1828; the eccentric mill, 1829; the dry-gas meter, 1832; a dynamometer and a pyrometer, 1848. In 1847 he built the first structure of cast-iron in the United States. Died 1874.