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

144 SOEMMERING S ELECTRIC TELEGRAPH.
2, are there soldered to the 35 brass plates, upon the wooden
bar, Ir 1K Through the front end of each of the plates, there is
Fig. 2.
w c c ch of the 3 a arg u a supor
points at t r a a l accord
/X // \ \
a small hole, I, for the reception of two brass pins, B and c;
one of which is on the end of the d o wire connecting the positive
pole, and the other the negative pole of the voltaic column, o,
fig. 1, and as seen attached to the voltaic pile, fig. 2, by the
wires c c. Each of the 35 plates are arranged upon a support
of wood, K K, to correspond with the arrangement of the 35
points at the reservoir, and ae letted a eraccordingly. When
thus arranged, the two pins froml the column are held, one in
each hand, and the two plates being selected, the pins are then
put into their holes and the communication is established. Gas
is evolved at the two distant corresponding points in an instant: for example, K and T. The peg on the hydrogen pole,
evolves hydrogen gas, and that on the oxygen pole, oxygen
gas.
" In this way every letter and numeral may be indicated at
the pleasure of the operator. Should the following rules be ob