The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 191
Fig. 130. DiREexioN OF Lines of Force of a Permanent Magnet. … Fig. 131. Direction of Lines of Force of an Electro-magnet.Their general course is shown in the cuts diagrammatically. The STANDARD ELECTRICAL DICTIONARY. 187 circles indicate a compass used in tracing their course. The mag-netic needle tends to place itself in the direction of or tangentialto the…
Electricity
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