Abstract
The calculations of the magnetostriction of ferromagnetic crystals below saturation by Akulov and Heisenberg have been extended to cover the case of an iron-like single crystal in th e form of an oblate spheroid for which the equatorial plane is a (001) crystallographic plane, with the magnetic field applied in any direction in the equatorial plane. The magnetostriction curves calculated on the basis of Law ton & Stewart’s theory of magnetization curves are compared with measurement of Honda & Masiyama and the present authors. Agreement with the latter is good and such discrepancies as exist can be accounted for satisfactorily.

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