Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 612
s as an electric valve,so highly sensitive that by its means a veryfeeble electric current is enabled to controla very much stronger one. In other words,the amplifier is connected with a battery fromwhich it obtains a new source of energy—afresh supply of juice, as electricians like tosay. Thus a… … DIAGRAM SHOWING THE AMPLIFIER STATIONS BETWEEN WASHINGTON, NEW YORK. AND SAN FRANCISCO 432 NATURE AND SCIENCE FOR YOUNG FOLK [Feb. to the amplifier, and this will, in its turn,pass them along to the stronger current com-ing from the battery associated with the am-plifier. Thus the feeble original…
Children's literature
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