It was found by
actual experiments that the same arrangement was good for lines
varying from 28 to 200 miles in length. A single wire between
Brussels, Ghent, and Ostend is now regularly employed for transmission
by telegraph of the ordinary messages and of the telemeteorographic
signals between the two observatories at those places, and by
telephone of verbal simultaneous correspondence, for one of the Ghent
newspapers. A still more interesting arrangement is possible, and is
indicated in Fig. 4. Here a separating condenser is introduced at the
intermediate station at Ghent between earth and the line, which is
thereby cut into two independent sections for telephonic purposes,
while remaining for telegraphic purposes a single undivided line
between Brussels and Ostend. Brussels can telegraph to Ostend, or
Ostend to Brussels, and at the same time the wire can be used to
telephone between Ghent and Ostend, or between Ghent and Brussels, or
both sections may be simultaneously used.
[Illustration: Fig. 3]
[Illustration: Fig.
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