Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 232
r;is; what takes place? Kxperiiiieiit 3. Strew lycopodium powder over a tuft of cotton-wool iiiid iuuite it Willi the lieated Avirc. IO.\l>eriiiieiit I. Connect the battery-wires (Fi.ii. i;51) witli a gal-vanometer (§ i;:.) G, a!s in the figure; the needle is deflected. Removetile platimun wire,… … We have already seen one illus-tration of this effectiu the glowing of thewhite-liot platinumwire. Experiment. Attachone pole of the batteryto a file (Fig. 132), andpass the other pole overits rougli surface. Thefile forms part of thecircuit; and as tlie wirepasses over it, the cir-cuit is rapidly…
Physics
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