Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 302
Fig. 20.5. The electric bell … Fig. 266. Cross sectionof electric push button 260 ELECTRICITY IX MOTION by the armatui-e /;. A very short time of closing of K produces a dot uponthe tape; a longer time, a dash. As the Morse, or telegraphic, alphabetconsists of certain combinations of dots and dashes, any desired mes-sage may be…
Physics
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