limb of electro-magnet

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electromagnet — /i lek troh mag nit/, n. a device consisting of an iron or steel core that is magnetized by electric current in a coil that surrounds it. [1815 25; ELECTRO + MAGNET] * * * Device consisting of a core of magnetic material such as iron, surrounded… … Universalium
Charles Wheatstone — Wheatstone, drawn by Samuel Laurence in 1868 Born 6 … Wikipedia
Railway air brake — Piping diagram from 1920 of a Westinghouse E T Air Brake system on a locomotive … Wikipedia
Hypnotism — • The nervous sleep, induced by artificial and external means, which has been made the subject of experiment and methodical study by men of science, physicians or physiologists Catholic Encyclopedia. Kevin Knight. 2006. Hypnotism Hypn … Catholic encyclopedia

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