Ruhmkorff coil, 121, 122 . Safety-valve, 32, 33 , 391. Sand-glasses, 411. Scissors, action of, 450 . Secondary winding of induction coil, 122. Series arrangement of electric lamps, 183. Series winding of dynamo, 173 . Shunt wound dynamo, 173 . Sight, long and short, 250. Signalling, automatic, 228; electric, 225; pneumatic, 225; power, 225. Signal levers, 206 . Signals, interlocking of, 204; position of, 202; railway, 200; single line, 215. Silencer on motor cars, 109. Siphon, 351 . Slide-valve, 49, 50, 51; setting of, 53. Sliders, 297. Sound, nature of, 270; board of organ, 296; board of piano, 280.
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INDEX.
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