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Excerpt from Earthquakes in the Light of the New Seismology
Two chapters, V and VI, describe in detail the more important instruments used in seismometry: (i) the best forms of seismoscopes; (2) the higher and more elaborate forms of seismographs, which analyse seismic motion and resolve it into its three co-ordinates; (3) the large. Italian vertical pendulums; (4) the most approved forms of the horizontal pendulum for recording the disturbances originat ing at far-distant parts of the world.
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