[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 168
y, and on page168 will be found an illustration of the relay. If the reader will study the diagram, Figure I,he will be able to understand the wiring andoperation of a telegraph line. Both sets of instruments are identical; indeedif other stations are inserted between the terminalof the line, there… … RECENT APPLICATIONS. 167 throughout the line receive the impulse. As thecurrent in a telegraph wire is exceedingly small,delicate apparatus alone can record the passage ofthe current. Usually the flow is too weak to worka sounder, so a relay b is inserted. The mag-net in this is very sensitive and…
Electricity
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