"The current on a long-distance line is alternating in character,
and it passes readily through a repeating-coil. The only effect it
has on the transmission is slightly reducing the volume. The
current passes into the repeating-coil, then divides and passes
through the two line wires. At the other end the halves balance,
so to speak. Thus, currents passing over a phantom circuit don't
set up currents in the terminal apparatus of the side circuits.
Consequently, a conversation carried on over the phantom circuit
will not be heard in either side circuit, nor does a conversation
on one side circuit affect the phantom. We could all talk at once
without interfering with each other."
"At any other time I should be more than interested," remarked
Brixton grimly, curbing his impatience to be doing something.
"I appreciate that, sir," rejoined Kennedy. "Ah, here it is. I
have the central down in the village. Yes? They will hold the boat
for us? Good. Thank you. The nine-o'clock train is five minutes
late? Yes--what? Count Wachtmann's car is there? Oh, yes, the
train is just pulling in.
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