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 81
One is that in air and most other mediums theyare influenced by a tendency to separate from eachother, but at the same time tend to take as shortpaths as possible. This separation is due to the fact 80 ELECTRICITY SIMPLIFIED. that air is a poor conductor for lines of force, or itspermeance is low;… … F^wL Fig. 15.—Experiment ShowingLines of Force Surrounding anActive Conductor. Fig. 16.—Diagram op Linesop Force Surrounding anActive Conductor. less marked; and if a piece of such substance beplaced in the path of lines of force, a portion ofthem will crowd together into it, leaving their…
Electricity
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