Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 347
e battery current. These currents were discovered by Faraday, and by himwere called the inverse and direct extra current respectively. 328 Electricity, [Book III. To exhibit their direction by the galvanometer is noteasy, as they occur with the battery current, in the sameconductor. Faraday showed… … Fig. 213. which was therefore traversed by a certain fraction of thebattery current, causing the needle to deflect. By laying apiece of cork or a brass weight on the galvanometer card heblocked the needle, retaining the needle at zero, while thebattery current was passing. Contact was broken by…
Electricity
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
