The telephone system of the British post office. A practical handbook (1901)
Herbert, Thomas Ernest · London, New York, Whittaker and Co. · leaf 169
harging switches in order that the length of wire between the cellsand the point of distribution may be as short as possible. Usually two sets of four cells are provided for speaking purposes. Thisenables sixty operators speaking circuits to be dealt with withoutdiflSculty. The speaking tablet,… … Figure 126. fact, under one-tenth of an ohm. Let us suppose that there are fifteentransmitters joined up to these bars. If now the resistance before thepoint of distribution is large, then speaking upon any one circuit will beheard upon all the remainder. The working of a telephone depends uponthe…
Telephone · Postal service
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