Lynde, Carleton John, b. 1872 · New York : Macmillan · leaf 253
vingmirror, when the imageappears as a series ofsparks side by side.It may be illustratedmore simply by allow-ing an electric spark topenetrate a piece ofcardboard; the rim ofthe hole will be roughon both sides, showingthat the electricitymust have passedthrough it in bothdirections. When a spark… … Fig. 172. -Wireless receiving apparatus. WIRELESS TELEGRAPH 239 and down produces a series of waves in the ether. Thesewaves travel out in all directions, and are detected at thereceiving station as explained below. Wireless receiving station. — A simple receiving station isshown in Fig. 172. It is…
Physics · Home Economics
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