The telegraph manual: a complete history and description of the semaphoric, electric and magnetic telegraphs of Europe, Asia, Africa, and America, ancient and modern.

272 BAIN S PRINTING TELEGRAPH.
and legible manner, the letters printed by the apparatus, two
thicknesses of riband, saturated with printing ink and dyed,
are supported by two rollers so as to interpose between the
type wheel and the cylinder (the rollers are not shown in the
figure, to prevent confusion). If a second copy of the message,
thus simultaneously printed at two distinct places, is desired
at either, a slip of white paper is placed between the ribands
to receive the imprint at the same time as the cylinder.
Fig. 2.
XX/// ///////////~/////////////~ ~// X -/
~~I'd~~~~~~ Ict
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Figure 2 represents a top view of the coil and magnets of
Mr. Bain's machine. B is the compound permanent magnet,
with six bars. N is the north pole, and s the south pole. A A
are the sides of the brass frame containing the coils; c c
are the spiral springs on each side: a a is the axis of the
coil: o o is a part of the frame containing the clock-work (not
shown in this figure), supporting one centre of the coil, and
I, a support for the other centre. N and P are the wires,
one of which is in connection with the ground, and the other
with the extended wire. When the circoit is closed, and the
current from p pole of the battery is in the direction of the
arrow above, and then through the coil to the other pole, N, in
the direction of the arrow below, the end, D, of the coil will be
depressed, and the end, u, will rise; reverse the current and
the effect is the elevation of the end, D, of the coil, and the
depression of the end, u.