Results of Earth‐resistivity surveys near Watheroo, Western Australia, and at Ebro, Spain

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Abstract
In the study of terrestrial electricity and allied phenomena a knowledge of the specific resistance of the Earth's crust is essential. And while the resistivity of its constituent elements is generally well known for laboratory conditions, but few data are available on the resistivity of the crust itself and its distribution laterally and with depth. As a first step in acquiring these data, the Department of Terrestrial Magnetism of the Carnegie Institution of Washington has undertaken a series of resistivity surveys in regions where records of earth‐current potential gradient are being obtained. By combining the resistivity results with the records of potential gradient, the actual current densities may be compared.

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