Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 253
FIG. 171. — Wireless sending apparatus.237 PHYSICS OF THE HOUSEHOLD … ^ Earth FIG. 172. — Wireless receiving apparatus. connected with a groupof wires suspended frominsulators attached to atall mast. This groupof wires is called theaerial. An electric sparkwhich appears to theeye to be one singlespark is really made upof from 10 to 30 sepa-rate sparks. This maybe…
Physics · Home Economics
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