The Weekly register., 1844-07-06

end OF the troughor battery is called the
positive, and the other end the negative
pole Of the battery. Now, if wire at
tached TO one end is brought near TO
wire proceeding from the other end,
the electricity passes from the positive
to the negative pole, and spark is seen
like that proceeding from the common
electrical machine, which is the cleo
trlcity seeking to establish an equiibri-
um. II the two wires are kept in con
tact, there is stream of electric fuio
passing from one to the other, which is
kept up by the action Of the acid on the
metallic plates already mentioned.
Now, the ordinary length Of these
wires, in common gavanic battery, is
but a few feet, but they may be thous-
and, or an hundred thousand, miles in
length, and the effect Of bringing them
in contact with each other is still the
same-that is, the flow through the en-
tire length of a stream of the
electricity at the rate already mention
ed. lfthere(ore the machine or battery
is in Washington, and o wire from the
positive pole is brought to Baltimore
and carried back to Washington, the
end of it, brought in contact with the
wire at the negative pole, which is but
a few feet long, VIII cause a stream of
electricity TO flow from Washington TO
Baltimore and back along the wire; and
It's this wire, coming here and going
back, which is to be seen on the posts in
Pra;t-street, the taco wires there visible
being in fact bat the opposite sides ola
loop Of wire which would be eighty
miles in length were il extended. And
this is the first thing to be understood.
Now II is known that piece Of sof
iron bent into the shape Of horse shoe
or letter u, becomes a magnet so lone
as a stream Of electricity is passing
through wire wrapped around it; anc
the wire from the positive pole of th'
battery, after coming to Baltimore, i
wrapped here round piece ofiron Q
the proper shape, and then goes back
to washington. To make thi iror
magnet, therefore, in Baltimore, it i.
only necessary to connect the ends o
the wires in Washington, when, so long
as they are connected, the stream oi
electricity which passes along them
produces the desired effect upon the
iron. When the connection is inter
rupted the iron ceases to be magnetic.
and is like any other piece Of soft iron.
This magnet which the Professor has the
power to create at pleasure, is his
prime mover. Immediately over the
magnet, say in Baltimore, is brass le-
yer, with piece Of iron attached TO it,
which is brought within quarter Of an
inch or less, ofthe horse shoe. As soon
as this last is made magnet by uniting
the ends Of the wire at Washington, il
attracts the iron on the lever and draws
one end Of the lever down, causing, at
the same time, the opposite end to rise.
At this opposite end is the pen or stylus,
which is Of steel about an inch long,
and about the size of a knitting needle,
Immediately over it is brass cylinder
with a groove around it, into which the
styEns strikes whea the magnet attracts
the other end Of the lever.
Not far from this roller are two 9th
ers revolving in contact, like the roll
els used to draw out cotton previous to
| spinning it in cotton mill, motion be-
ing given to them by very simple clock
work moved by a weight. The Office
ofthese two rollers is to draw from an
other roller, and under the grooved roll
Ter, strip of paper which is wound
round it like a riband on It's centre
block. With these explanations the
operation of the machine can be readily
understood. When the Professor in
Washington wishes to send message
to Baltimore he spells il with letters.com-
posed ofdots and lines-for instance A
may be dot and line thus B
two dots and line, thus. c q
line and dot, thus -. By connect
ing the ends of the wires for an instant