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 198
Fig. 164.—DArsonval Mirror-Reflecting Galva-nometer with Scale and Reading Telescope. … SHIP Fig. 165.—Connections of Single CoilAstatic Galvanometer. forming an astatic needle, \ 58, and suspended, the earths field has almost no directive force on the magnetic system. Since the earths attraction for this needle has been thus neutralized, a much smaller current will deflect it than…
Electricity · Magnetism
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