Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 148
operation depends upon a perma-nent magnet can be used only in direct-current measure-ments, because the direction of the deflections is dependentupon the direction of the current through them. CLASS B 145. Plunger Type Ammeter or Voltmeter,—The construc-tion of a plunger type ammeter or voltmeter…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-89-79.webp)
