A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 524
of the observer represent the dashes, and move-ments to the left, the dots of the Morse alpha-bet. The single-needle apparatus of Wheatstone andCookes system is shown in Figs. 535, and 536.Fig. 535, shows the external appearance, and Fig. … Fig. S36. Wheatstone and Cookes Single-Needle Appa-ratus, Internal Arrangement. Movements of the top of the needle to the right Fig. 537. Wheatstone and Cookes Single-Needle Ap-paratus, External View. 536, the internal arrangements as seen from theback. An astatic needle is placed inside two coi)of…
Electricity · Electrical engineering
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