Abstract
TWO years ago the writer described in NATURE (vol. xxx. pp. 149 and 174) some of the instruments which he had designed and used in Japan for the registration and analysis of earthquake movements. In response to applications from the directors of several observatories, who wished to add seismometric apparatus to their other equipment, arrangements were some time ago made with the Cambridge Scientific Instrument Company for the manufacture of instruments by aid of which the observation of earthquakes might become part of the ordinary work of any meteorological or astronomical station where such movements occasionally occur. In the design of these seismographs the object has been kept in view of making them easily capable of use by observers who have not made seismometry a special study. They are entirely self-recording, and require little attention during the long intervals which must, in most situations, be expected to elapse between one period of activity and the next.
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EWING, J. Earthquake-Recorders for use in Observatories . Nature 34, 343–344 (1886). https://doi.org/10.1038/034343a0
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DOI: https://doi.org/10.1038/034343a0
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