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 16
Fig. 122. Note.—The pupil may be in-genious enough to invent newexperiments for himself andthe class. The ability to in-vent is often very valuableand may be acquired early mlife. Most of the great in-ventors began making experi-ments when mere children. 303. Electric At-traction. — The…
Electricity · Magnetism
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