Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 193
Fig. 158.—Students Tan-gent Galvanometer. … GALVANOMETERS. 175 maybe connected up in a number of different ways to illustrate thelaw of series and parallel circuits, and the magnetic effect upon theneedle by varying the number of turns around it. Figs. 160 A, B andC, illustrate several connections of the galvanometer coils, and theturns, or…
Electricity · Magnetism
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-graphophonepaten15unit-809-430.webp)
