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 74
Fig. 35. — Differential winding. Difcreutidl winding is the term used when each hobliinof the electromagnet is simihndy woiind with tico wiresside by side so that they are of the same length, resistance. ^TELEGRAPH INSTRUMENTS 63 and average distance from the core, thns giving eipialmagnetic…
Telegraph
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