An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 178
T T … Fig. 91. — Induction coil and its cross section. It furnishes a storage place into which the current can surgewhen broken and it diminishes the sparking at the interrupter.Even with a condenser there is some sparking, and so thecontact points have to be tipped with silver, platinum, or tung-sten…
Electricity · Magnetism
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