The Electric Polarizability of Apertures of Arbitrary Shape

An electrolytic-tank method of measurement developed in a previous paper has been used to obtain extensive data on the electric polarizability of apertures of various practical shapes. These shapes include rectangular slots, rounded slots, crossed slots, rosettes, and dumbbells. The measured values are presented in this paper in both graphical and tabular form. The accuracy is believed to be of the order of one or two per cent.