Abstract
THE comparison of field curves with sets of standard curves, as suggested by Mr. W. G. G. Cooper, is one method of interpreting results. This method requires a large number of standard curves even for the two-layer case, as there are two variables, namely, the depth of the surface layer and the ratio of the resistivities of the two layers. The number of standard curves is reduced to a single set when logarithmic curves are used, as suggested by Whitehead and Radley1 and in my original letter2. Mr. Cooper agrees with me that for multi-layer curves the use of logarithmic curves is a definite advantage.
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References
Whitehead, S., and Radley, W. G., Proc. Phys. Soc., 47, 589 (1935).
Hough, J. M., Nature, 161, 812 (1948).
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HOUGH, J. [Letters to Editor]. Nature 162, 970 (1948). https://doi.org/10.1038/162970b0
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DOI: https://doi.org/10.1038/162970b0
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