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 122
r of their own weight.The iron ring may be made without handles by anyblacksmith. Stout cords will answer for handles.The helix may be made by winding insulated wireupon a pasteboard cylinder an inch or an inch and ahalf long There should be four or five layers ofstout, copper wire which may be… … Fig. 199. 417. Deflection of the Magnetic Needle.— We have already seen that the voltaic current has amarked effect in turning the magnetic needle from its northand south position, tending to place the needle at rightangles to the direction of the current. This may be easilyshown by Oersted^s…
Electricity · Magnetism
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