Y FRANK C, PERKINS. the lighter-than-air class, leaving aside the servile imi- The construction of an electro-magnet for lifting tations of the flight of birds. He showed how the heavy pieces of iron and steel, and the design of the desire to conquer the obstacles opposed by the wind same, would… … Lebaudy, with “Le Jaune,” method of operation of this made the most remarkabie AN AMERICAN PLATE-LIFTING ELECTRO-MAGNET. class of apparatus. experiments. Apropos. of The electro-magnet, when this, Capt. Mathieu predicted the victory of “Le Jaune” ated machine tools, electric cranes, and other…
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