num wire, running loosely from the cylinderto a hook, which latter is connected with an external in-sulated binding post. The method of making this finewire is of interest. A very fine platinum wire is heavilysilver-plated. The wire thus formed is drawn out as fine INSTRUMENTS. 101 as might be and… … Fig. 48. center of the containing case is a small magnetic needle.On the outside of the case and symmetrically disposedwith reference to the needle are two coils of insulated wireof different numbers of turns, whose terminals are insul- 102 STATIC ELECTRICITY. ated binding posts. The instrument may…
Electronics · Electricity
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