II. The thermomagnetic analysis of meteoric and artificial nickel-iron alloys

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Abstract
The experiments described in this paper arose from the desire of Sir Arthur W. Rücker to obtain, in connection with his researches on the nature of the Earth’s magnetic field, further data concerning the properties of such magnetic materials of natural origin as may he present in appreciable quantity in the Earth’s crust. Iron of cosmic origin contains nearly always an appreciable quantity of nickel, and the magnetic properties of this material, especially their variation with temperature, have received very little attention. Most of the published data are qualitative only, and from them no very definite conclusion can be drawn beyond the fact that meteoric iron appears to be of very variable permeability. It was, therefore, thought desirable to make a careful quantitative study of a typical example of such material.

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