distance, carried out for Gaetano
Rossi at Piovene in Italy, and a 300 horse transmission at 6 kilom.
distance installed for Giovanni Rossi, in which the power is given off
at two different stations.--_The Engineer._
* * * * *
THE ADER FLOURISH OF TRUMPETS.
Although telephonic novelties are not numerous at the Universal
Exposition, telephony--that quite young branch of electric science--is
daily the object of curious and interesting experiments which we must
make known to our readers, a large number of whom were not yet born to
scientific life when the experiments were made for the first time at
Paris in 1881; and it is proper to congratulate the Societe Generale
des Telephones on having repeated them in 1889 to the great
satisfaction of the rising generation.
We allude to the Ader system of telephonic transmissions of sounds in
such a way that they can be heard by an audience.
The essential parts of this mode of transmission consist of two
distinct systems--transmitters and receivers.
[Illustration: FIG. 1.--THE ADER FLOURISH OF TRUMPETS]
The transmitters are four in number, and are actuated by the same
number of musicians, each humming into them his part of the quartet
(Fig. 1). This transmitter, represented apart in elevation and section
in Fig. 2, is identical with the one used in the curious experiment
with the singing condenser.
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