Orleans County monitor. [volume] (Barton, Vt.) 1872-1953, 1879-05-26
THE PRINCIPLES OF THE ELEC-
TRO.NfOTOGRAPH.

describes the origin and development of
the electro photograph, Mr.. Edison's
most important invention, together with
some applications of the principle hith-
erto unannounced. It must not be for
gotten that this invention, which now
transmits the human voice at distance
with perfect clearness and accuracy, is
not only an application of well-known
laws of acoustics but involves the dis
covery by Mr.. Edison of an entirely un-
known property Of electricity.viz.. that
Of destroying friction. Of the differance
between it and the phonograph. the
writer says:
The latest achievement of Mr.. Edison
is the electro photograph, brief expla-
nation of which was made in the May
Hutn''o- H. magazine A1thoucb r.
is yet in its infancy, the scope OF us uuIl-
ity has already become far more extern
sive than that of any of Mr.. Edison's
previous inventions. Probably its most
striking feature is its paradoxical power
Of making the human hand talk for the
hand revolves little cylinder, and the
instrument speaks as it is hidden, and
when tie hand stops turning, the in
struments ceases to speak. At super
fetal glance, this principle would seem
to be the same as that Of the phono-
graph; but in point of fact there is no
essential similarity between the two in
ventions; they are used for entirely diff
ferent purposes, and are governed by
separate and distinct laws. The phon-
ograph records and preserves the waves
of sound the electro motograph-or, as
it is called when used in connection
with acoustics, the chemical telephone"
records nothing. In the phonograph,
the main principal is the indcntation of
tin-foil on cylinder, by small needle
attached to diaphragm, which is set in
motion by the waves of sound. In the
chemical telephone there is likewise a
cylinders and diaphragm but with
these its resemblance to to the phono-
graph ceases. On the cylinder of the
chemical telephone rests a metal arm
attached to diaphragm, and the pas
sage of electric waves through such
cylinder causes the vibration of the
diaphragm, as will be explained farther
on. The scientific principle involved in
the electromagnetic discovery is diam
etrically opposite to the main principle
in electro-magnetism, and yet it per
forms in most cases exactly the same
functions as electro magnetism.
In all contrivances hitherto used for
producing mechanical movement at a
long distance, the agency employed has
been electro-magnetism. Take for Illus
tratlon the ordinary Morse telegraph
This, as every school boy knows, con-
sists in the rough of of soft iron around
which is coiled continuous fine wire
through which wire is passed, so to
speak, current of electricity. This,
current magnetizes the piece of soft iron
which thereupon is enabled to attract 9
second piece of iron or armature. Here
: then, we have mechanical movement,
produced by energy transmitted from a
distance. By means of the discovery Of
the principles of the electro photograph
Mr. Edison has made it possible to pro.
duce mechanical movements at dis
tance without the employment of elec
tro-magnetism. In other words, had the
inventor of the telegraph never lived
and had electro magnetism never been
discovered, we might today accomplish
the same results by means of the elec.
tro-motograph.
/ Coon ADvICE.-A great many date
their fall to period when they disobeyed
their parents, and being out late al
night on the street corners, where idle
1 and disorderly boys would congregatt
: together Now, fathers and mothers
let me urge you to know where YOU
7 children are after dark. And then again
7 do nothing in thoir proeonoo which yo1
t would not want them to do. Home in
: fluence will always tell, be it for gooC