Electricity simplified. The practice and theory of electricity .. (1891)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, N. W. Henley & co. · leaf 82
lines of force, a portion ofthem will crowd together into it, leaving their normalpaths through the air for the better medium, iron,nickel, or cobalt. This is because the metals inquestion have high permeance for lines of force. THE MAGNETIC CIRCUIT. 81 Lines of force must go from somewhere to… … Fig. 17.—Use of a Compass in Tracing Lines of Force. all emerge from the poles. A multitude of linesstart from all parts of the magnet and enter at cor-responding points on the other side of its centre orneutral point. They may be traced by a small com-pass whose needle tends always to lie parallel…
Electricity
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