. Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development . electric wave reaches an electric circuit, a transmis-sion line, etc., it produces a miniature lightning dischargein this circuit, by what we call electric induction. If theelectric pressure or voltage of this induced lightning inour electric circuit is high enough, it breaks down the in-sulation and shuts down the circuit
. Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development . electric wave reaches an electric circuit, a transmis-sion line, etc., it produces a miniature lightning dischargein this circuit, by what we call electric induction. If theelectric pressure or voltage of this induced lightning inour electric circuit is high enough, it breaks down the in-sulation and shuts down the circuit and the lights goout. Therefor, we have to install lightning arresters inall electric circuits to protect them against this inducedlightning. POWER OF LIGHTNING. From the action of the induced lightning in our electriccircuit we can calculate its voltage, and from the voltageof this induced lightning in our circuits, which was pro-duced by the electric wave sent out by the lightning flashin the clouds, we can calculate back the voltage or electricpressure of this lightning flash in the clouds, and findthat the voltage of the lightning flash averages about fiftymillion volts. It may be as low as twenty millions, ormay go as high as one hundred million volts, and even. Copyright, InternationalONE INCH SQUARE RADIO SETAlfred Giovanni, a fourteen-year-old freshman in the United HighSchool at Knoxville, Pa., with his one inch square radio receivinginstrument, probably the smallest of its kind in the world. The instru-ment is capable of picking up radio messages for a distance of morethan fifteen miles, and is complete in every detail.
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Keywords: ., bookcentury1900, bookdecade1920, bookidradiomiracle, bookyear1922
