The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 115
a 9B DYNAMIC ELECTRICITY AND MAGNETISM. coefficient of the magnetism and electricity of the in-closing coil ; so that the magnetic and electric strengthdeveloped is in proportion to the coefficient of mag-netism in the core, as this property of permeability hasbeen termed. Induction-Coil.—The… … Fig. 42. Its general construction, with some variation in minordetails, will be understood from Fig. 42. It consists ofa primary coil of a few layers of cotton-wound, coarsecopper wire, usually No. 14-20, inclosing a core made ofa bundle of soft-iron wires. This coil is inclosed in asecondary coil…
Electricity · Magnetism
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