3615.     ---------------.  [WATASE, T.]  [Heat of Formation of Cementite.]  Ztschr. physik. Chem., vol. 147 A, 1930, pp. 390-395; Chem. Abs., vol. 24, 1930, p. 3702.

        Previous value (abs. 3614) for the heat of combustion of Fe₃C was recalculated at 362.5±0.1 cal. and the heat of formation as -2.5 cal., by using the latest thermochemical data of Roth (abs. 2908).