Word: hillwoman
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When an electric current flows through a wire it stirs up a magnetic field going around the wire like the brass rings on a Burmese hillwoman's neck. Prof. Ehrenhaft says that, in turn, there is an electric current going around any magnetic field. He places the poles of a magnet one above the other in water-whereupon small, electrically-charged bubbles go round and round the magnetic field between the poles...
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