Pure alpha-manganese was prepared by distillation. Beta-manganese was prepared by melting a sample of the alpha-manganese in vacuum, and quenching it in water from about 1000°C. The mass susceptibilities of these two specimens were measured by a null-reading, astatic magnetometer, and found to be ${9.60\left(10\right)\mathrm{}}^{-6\mathrm{}}$ and ${8.80\left(10\right)\mathrm{}}^{-6\mathrm{}}$ respectively. These results eliminate the possibility that the ferromagnetic manganese found by some investigators is either the alpha-or the beta-crystal form.

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