Abstract
A Coulomb torsion balance apparatus was developed with which absolute measurements of para‐ and diamagnetic susceptibilities could be made in non‐fluctuating field strengths of the order of 1 oersted. Solid specimens of the diamagnetic elements, bismuth, antimony, and cadmium, were measured in fields of 2.5, 5, and 10 oersteds, and the para‐magnetic powders, [Formula: see text], [Formula: see text], and [Formula: see text], in fields of 2, 3, and 5 oersteds. The susceptibilities decreased with increasing field strengths. A specimen of bismuth granules had lower susceptibilities than did the solid specimen made from the same supply of granules. A semi‐micro balance apparatus also was constructed for absolute measurements in fields ranging between 100 and 1,000 oersteds. The susceptibilities of the diamagnetic specimens and a water specimen were measured. The solid bismuth, antimony, and cadmium specimens and a water specimen exhibited constant susceptibilities. The susceptibility of the bismuth‐granule specimen increased regularly from −4.67 to [Formula: see text] C.G.S. when the field increased from 100 to 900 oersteds. The value found for water [Formula: see text] agreed well with the International Critical Tables value [Formula: see text].
Published Version
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