Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)
Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 116
Fi<;. 81.—Elements cf double woundresistance coils. TELEGRAPH INSTRUMENTS 105 values is illustrated iu Fig. 82. The resistances are 50,100, 200, 300, 400, lOUO, 2000, and srixe a range from50 to 4050 by gradations of 50. … V\>.. 82. — Coii(li;ii.S(M- risis.iiiiec cijils.
Telegraph
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