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Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)

Davis, Daniel · Boston : Palmer and Hall · leaf 161

An illustration from Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity, 1854, leaf 161 — little greater thanthe breadth of the magnet. Tothe middle of the wire a small fly-wheel is attached. This armatureis placed across the magnet, at somedistance from the poles, and themagnet held in such a position,with the poles downward, that thearmature may roll towards them.When it reaches the… … MAGNET AND ROLLER. 145

Magnetism · Electricity · Electromagnetic Phenomena

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