Letter | Published:

Geo-electrical Prospecting

Nature volume 127, page 443 (21 March 1931) | Download Citation

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Abstract

IN my article published in NATURE of Jan. 3 of this year, entitled “Geo-electrical Prospecting by A.C. Bridge Methods”, I stressed a disadvantage of the well-known A.C. equipotential line method of prospecting, which is sometimes so serious as to preclude the use of the method altogether. The difficulty arises from the fact that large out-of-phase components occur in the neighbourhood of the more highly conducting ore-bodies and that in such circumstances it is impossible to locate equipotential points with any degree of accuracy. In extreme cases there are no distinguishable minima from which the general trend of the current distribution may be determined.

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  1. Australia House, Strand, London, W.C.2, Mar. 17.

    • A. BROUGHTON EDGE

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DOI

https://doi.org/10.1038/127443a0

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