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The paper deals with certain anomalies in the amplitudes of the waves observed in near earthquakes, and their relation to the method of transmission across interfaces. It is suggested that amplitude-observations in seismic prospecting may help to solve these theoretical problems. A rediscussion of the time relations shows that these are so closely related to the structure immediately below the observing station that the form of the interfaces produces no other appreciable effect.
Harold Jeffreys (Wed,) studied this question.
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