Induction coils : how to make, use, and repair them including Ruhmkorff, Tesla, and medical coils, Roentgen radiography, wireless telegraphy, and practical information on primary and secondary battery (1901)
Schneider, Norman H. (Norman Hugh) · New York : Spon & Chamberlain ; London : E. & F.N. Spon · leaf 254
direction with his elec-tric resonator (Fig. 68). This apparatusconsisted of a 3-inch spark induction coil,/, the secondary wires 5 5 being connectedto the copper rods R R, provided withmetal balls B B, nearly 11 inches in diam- Tcsla and Hcrtr; Effects. 227 eter. The discharging balls D D were… … Fig. 68. when the ring was situated in a distantroom. In many experiments with a rap-idly vibrating induction coil current, asparking has been noticed in metallic ob-jects in the same room, in one instance it 228 Tcsla and Hertz Effects. being discovered in the metallic designson a walLpaper. The…
Induction coils · Radiography · X-rays
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