Ferric Substance Formed in Water Circulating in Boilers and Steam Piping, and an Apparatus for Magnetic Treating it S. Ishibashi, T. Sato, M. Yokoyama, K. Haneda et Y. Kato J. Phys. IV France, 07 C1 (1997) C1-531-C1-532 DOI: 10.1051/jp4:19971217