propagation wasparallel to the lines of magnetic force.* Before theelectro-magnet was excited an analyzer, similar to thoseused in polariscopes, was arranged to intercept allthe waves of light. When the magnetic field was pro-duced by the rotational current of electricity the lightwaves were… … same is equally true and more easily proven; for in-stance, when a current passes through a coil of wireit assumes all the characteristics of a magnet ex-hibiting the same curved lines of force, attraction formagnets of the opposite sign and repulsion for thoseof the same sign, and other phenomena…
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