Willoughby, George Alonzo, 1894- · Peoria, Ill. : Manual Arts Press · leaf 41
se of a bell is to touch the wire dis-connected from the battery, and theshort one connected to it for testing, tothe tongue, keeping them about one-fourth of an inch apart. If currentflows, a sort of sour taste will be no-ticed. These tests should be triedwith the push-button closed. If a Fig. 16.…
Electricity · Electrical engineering
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