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
V\>.. 82. — Coii(li;ii.S(M- risis.iiiiec cijils. … Iii:. S;t.—IMctal-ciiscd resistaiic. In Fig. (S.> we liav(^ an illustration of a coil Wdiiiul iion-iiiductivelv on a hrass hobbiji enclosed in a brass ease witli 106 ELEMENTARY TELEGRAPHY the terminals mounted on an ebonite strip. Tliis is nsitallytermed a metal case resistance and the values of…
Telegraph
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