Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 303
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… … Fig. 267. Principle of the telegraph practice the message is not ordinarily recorded on a tape, for operatorshave learned to read messages by ear, a very short interval between twoclicks being interpreted as a dot, a longer interval as a dash. The first commercial telegraph line was built by S. F.…
Physics
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