Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 134
he hands. The series ofholes made by the left-hand key corresponds to a dot, thesingle hole made by the centre key to a space, and the setof four holes made by the right-hand key to a dash. Theholes made by the centre key are in the centre of the ribbon,as shown in Fig. 34, and they are smaller… … Fig- 35. 122 ELECTRICITY IN MODERN LIFE. be seen that for each dash two central holes are punched,so that the paper will move twice as far for a dash as for adot. Fig. 35 shows a strip of paper thus prepared toindicate the word Paris, by means of dots and dashes, asshown on the lower part of the…
Electric industries · Electricity
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