Word: interact
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Dates: during 1951-1951
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...Stream obtained by a gadget called the Geomagnetic Electrokinetograph. GEK is a steel box full of vacuum tubes which analyzes electrical information from two electrodes trailed behind the ship. When the ship is swung 90° in one direction and then 180° in the other direction, the electrodes interact with the earth's magnetic field and so measure the motion of the water in relation to the sea's bottom...