scale. On the bottom of the case a similar series of springs, not shown,
are secured. The apparatus is provided with an induction coil, J, which
is connected to the microphone, battery, and telephone receiver (which
may be of any known description) in the usual manner.

[Illustration: Fig. 1.]

The inventors claim that the use of the vibrating springs give to the
transmitter an increased power over those at present in use. They state
that the instrument has given very satisfactory results between Ostende
and Arlon, a distance of 314 kilometers (about 200 miles). It does not
appear, however, that microphones of the ordinary Gower-Bell type, for
example, were tried in competition with the new invention, and in the
absence of such tests the mere fact that very satisfactory results were
obtained over a length of 200 miles proves very little. With reference
to a statement that whistling could be very clearly heard, we may remark
that experience has many times proved that the most indifferent form of
transmitter will almost always respond well and even powerfully to such
forms of vibration.--_Electrical Review_.

[Illustration: Fig. 2.]

[Illustration: Fig. 3.]

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NEW GAS LIGHTERS.