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 158
Fig. 88. si 224. Let the north pole of a steel magnet, N S(Fig. 88), be placed on the middle of a bar of iron. The part of the bar in contactwith the magnet becomes asouth pole, while north polarity-is distributed alorjg both halvesof the bar. 225. If several pieces of ironwire, of the same length,…
