The Redwood gazette. [volume] (Redwood Falls, Minn.) 1873-1940, 1877-03-01

stand at sight. The instrument consists
OF . powerful, compound. permanent
magnet, to the poles of which are at
tached ordinary coils of insulated wire.
In front of the poles, surrounded by these
coils OF wire, is placed q diaphragm OF
iron, while mOuth-piece to concentrate
the sound upon this diaphragm substan-
TALLY completes the arrangement. When
the human voice causes the sensitive dia-
phragm to vibrate, electrical undulatiOns
are induced in the coils surrounding the
magnets precisely in the same manner as
the undulatiOns of the air are produced
by the voice. These undulations then
travel through the wire, and. passing
through the coils of an instrument OF
similar construction at longer or shorter
transformed into air undulations by the
diaphragm of the instrument. 1t will be
borne in mind that the voltaic battery Is
dispensed with entirely, and all that Is
needed for transmitting the voice sounds
are the instruments and the telegraph
wire. In this connection a remarkable
peculiarly of the telephone is that q
pyacticed ear is able TO distinguish the
voices that speak through the instrument.
The inventor claims that as any effect
produced by electricity over short wire
can with equal facility be produced over
one of 100 or 1000 miles in length, pro-
vided tie insulation be good, so can the
electric wave of the telephone be per-
fected to render free and easy the sounds
generated by the human voice to any
length. In fact, with such advances as
| the system has made of late, there would
seem to be NJ limit to which it may be
put and the practical advantages likely
to result from it. The invention is now
in its infancy, but no doubt it will soon
astonish the world by what it may be able
to DO, if l am not mistaken in the charac-
ter OF the hints thrown out upon the sub
ject.
1t is probable that among the first prac-
tical uses to which the telephone will be
put will be its use by several of those rail-
roads that have special wires used only
for railroad purposes. Next, private
banking houses and large manufacturing
establishments, etc., will find it advan-
tageOus to use the telephone. 1t is we'll
known that the expense and trouble of
batteries and keeping them in order has
been one Of the main items in the account
of telegraphing, and with the present sys-
TEN expert operators are required. Under
The system of telephony the cost of con-
structing the line and putting in the in
strument is all, and the affair is perma-
nent so long as the wires and the poles
shall last. The invention will be wonder
fully economical, to say the least, as we'll
as more expeditions and easier to learn
to operate than the present system Of tel
egraphy. This invention will not only
be decided improvement, but may ex-
ert powerful influence in breaking up
the telegraph monopoly and reducing
rates to lower scale than that now in
vogue.
Respecting the adaptation of the inven.
ton to long distances, the late expert
ments warrant the belief that it can be
made to answer all the purposes of the
telegraph either under the ocean or across
the land The artificial resistance EN-.
ploycd in the experiment between Boston
and Salem, as already limited, was much
greater than an equivalent of the length of
the wire between New York and Francis
co or the Atlantic cable. In fact, the in
ventors hope soon to talk through the ca
bic and send their compliments to Queen
Victoria.-Boston (Fsb. ~ Cor. N. Y.
GraDhic.