2084.     LEHRER, E.  [Recording Apparatus for Determining the Magnetic Transition Points of Small Samples.]  Ztschr. tech. Physik, vol. 10, 1929, pp. 177-185; Chem. Abs., vol. 23, 1929, p. 5063.

        Discusses theory and possibilities of the instrument at some length.  Curves are shown for Fe at various field strengths.  Of the unusual applications are cited:  Quantitative analysis of an Fe-cementite mixture (3% accurate), thermal decomposition of Fe₂N into Fe₄N.  Gives preliminary data on the latter process.