The specimen, in the form of a circular loop of wire, is fastened at one point to a rigid support. At the diametrically opposite point a magnetic field is applied. The frequency of an alternating current in the loop is adjusted until flexural vibrations occur in the plane of the loop. Then the resonance frequencyf,the radius of the loopr,the linear densitym,and the radius of the wireaare related to Young's modulus by the equationE=18.395mf2(r/a)4(1−g) in which (1−g) is a gap correction factor.