Elementary lessons in electricity & magnetism (1895)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · New York and London, Macmillan and co. · leaf 92
to turn about a point C. It iselectrified from a known source. Under it are placed(Fig. 52) two semicircular disks, or half-rings of dissimilar becomes free when the top plate is lifted up; the above is, however, amore scientific and more accurate way of saying the same thing. Thestudent who is… … chap, i CONTACT SERIES OF METALS 85 metals. Neither attracts or repels the electrified needleuntil the two are brought into contact, or connected by athird piece of metal, when the needle immediately turns,being attracted by the one that is oppositely electrified, andrepelled by the one that is…
Electricity
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