The Dallas daily herald. [volume] (Dallas, Tex.) 1873-1887, 1877-02-09
THE TELEPHONE.


WONDERFUL experiments, Etc.
The Boston Transcript, Of February /,
says AT noon, yesterday II distin.
guishcd party of gentlemen were assem-.
bled at the Office of the Boston Rubber
Shoe Company, on Congress street, in
order to witness II series of experiments
performed on the telephone between
the inventor, Professor A. Graham Bell,
here, and his associate, Mr. Thomas A.
Watson, at the residence of Mr. Con-
verse, Mt Maiden, about six miles dis
tant
The telephone, in its present form,
consists of u powerful, compound, per.
manent magnet to the poles of which
are attached ordinary telegraph coils of
insulated wire. In front of the poles,
surrounded 10y these coils of wire, is
placed q diaphragm Of iron. A mouth.
piece to converge the sound upon this
diaphragm substantially completes the
arrangement. As is well known, the
motion of steel or iron in front of the
poles of magnet creates current of
electrlcityin coils surrounding the poles
ofthe magnet, and the duration of this
current OF electricity comedies with the
duration OF the motion of tho steel or
ron moved or vibrated in the proximity
of the magnet. When the human voice
causes the diaphragm to vibrate,
electrical undulations are induced in
tho coils environing the magnets
precisely analogous to the undulations
OF the air produced by that voice.
These coils are connected with the line
wire, which may be OF any length, pro.
yided the insulation be good. The undu
lations which are induced in these coils
travel through the line wire. and, pass
ing through the coils of an instrument
of precisely similar construction at the
distant station, are again resolved into
air fluctuations by the diaphragm of
this instrument
The simplicity of Professor Bells
system will be ut once apparent when
it is known that the voltaic battery is
entirely dispensed with All that is
required for communicating between
the most distant points are the
instruments and the telegraph wire,
the latter taking the place of the
speaking tube and the former that
of the mouth pieces. The short
distance which separated Messrs. Bell
and Watson in their experiments
yesterday must by no means be
considered gauge Of the powers OF the
instrument, as any effect produced by
over n short wire can with
equal Facility DO produced over one
Extend Dg one hundred, or, for that
matter, one Thousand miles, provided,
of course, that the insulation be good
In fact, the inventors have already
through an artificial
resistance far exceeding that of any
of the Atlantic cables. Although to
the uninitiated this might seem to
imply that conversation could be |
carried on across the Atlantic |
by this means yet as all |
electricians and men of science are
aware, there are other elements enter
ing into the consideration of such a
problem besides that of mere resist
ance As proof of the rapid progress
made III this science it may be stated
that is only within the past few months
that the instrument has been sufli-
GENTLY perfected TO allow of free and
easy conversation taking place through
this new vehicle. e3, 49,,
The experiments yesterday we're as
'ollows Telephones having been con!