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<p>In this paper is treated the measurement of the "effective inductance" of non-inductive resistance coils for use in alternating-current bridges and in potentiometer circuits where it is desired to know the phase-angle. The latter depends on the inductance and the capacities between the windings and between the various parts of the coil and the earth. The "effective inductance" is that value of inductance which would produce the observed phase-angle. The measurements with coils of low resistance are best made by means of a substitution method, tiding us a standard of reference a resistance of the same nominal value as the unknown, but such that its inductance may%2
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<br>Subjects: inductance; measurements and use of instruments; Condensed matter; electronic structure, electrical, magnetic, and optical properties</div>
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