Abslraact. The calculauon of the torque T an a permanent ellipsoidal magnet immersed in a magnetic liquid is more delicate than one might be inclined to expect. This problem, for instance, has a bearing on fundamental discussions carried out in the past about the choice between different formulotioor of electromagnetic theory. The present paper analyses the calculation of T anew. emphasizing the relation to, and the explanation of. the imponmt experiment carded out by Whitwonh and Stopes-Roe in 1971. The outcome of the experiment is explained in r e m of stmdxd magnetastatics. based upon use of the scalar potential ). The relation to the sa-dled KennellySommerfeld eontmveny is commented upon. The physical interpretation of the situation is elucidated by -ing out in deml sn examination of the total energy balance in the special case of spherical mgnet geometry.

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