Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 66
Test-needle, Mr fits ilAGSKTISM: i1 … and repulsion on one pole may, therefore, be considered equaland opposite, so that the bar is simply directed, and thereis no motion of translation. The distance through whichthe earths magnetic pole at-tracts the N-pole of a mag-netic needle is less than thedistance through which theS-pole of the…
Electricity · Magnetism
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