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Polar charts have been constructed for seven inclinations of the earth’s magnetic field for use in calculating total-intensity anomalies of three-dimensional bodies of arbitrary shape. Starting with a semi-infinite body, the explanation progresses cumulatively, treating finally a laminated body of finite dimensions. The chart at magnetic inclination 7 = 90 is simply a solid angle chart and can be used for calculating gravity anomalies. Examples are given of applications to observed anomalies.

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