How to Understand Electricity

How to Understand Electricity

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... carries a stop screw at its upper end, while the front end of the arm sets directly under it, and all of which is pictured at B. The way that the key, the sounder and the - battery are connected together is shown in the wiring diagram at C. /4-////4/a#39;.

Title:How to Understand Electricity
Author:Archie Frederick Collins
Publisher: - 1944


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