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 73
Fio. 34—rolarized sounder with fix-d adjiistnienls. hliunted with a resistance of 27,000 giving a combinedresistance of 4500. … 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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