ped. A sheet of copper net is made of twenty thicknesses of ordinary one inch hoop iron, about 1-20 inch.thick, thus making a rectan- moved back and forth between the pole pieces offers a sensible resistance. gular U-shaped core one inch square. The parallel arms Most experiments in diamagnetism… … Figs. 4 and 5.-DIAMAGNETISM. Fig. 1.-ELECTR0-MAGNET PAETLY IK SECTION. formed with this magnet. Short bars of various metals fitted to and'supported by a rectangular wooden block. maybe suspended, by means of a silk fiber, between When the core has reached the required thickness, the the poles.…
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