Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 71
Experiment 41.—In the electric chime, represented in Fig.159, the outer bells are to be put into communication with the primeconductor; the central bell is in communication with the earth.
Electricity · Magnetism
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