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

THE MANIPULATING APPARATUS. 339
ceiving apparatus are attached at G and E, or at G' and E, and
the line wire is attached at N and N.
At H K and H/ K/ are fastened the bell wires. The two commutators N V and N/ V/ enable the operator to employ a
single manipulator in two different directions. When it is desired to correspond, the spring N v is placed in contact with L.
In the position of fig. 5, the current coming from the line x,
follows the route N L L / o F' v E, traverses the receiving apparatus, and returns to E, when it goes to the earth ty the wire
G T. In order to transmit, the crank, A B, is turned, and by
placing it Ao the ktter A, the spring! o D, comes into contact
with the binding screw, P, the current leaves the copper pole
of the battery, follows the route c p F o L/ L N, and passes to
the corresponding station in the direction of x. It produces an
attraction of the armature and the needle of the receiving apparatus, and advances over the letter A. On placing the crank
over B, the lever, o B, resumes its position, the current is inFig. 5.
K'
/\ o C oTnr un4c a eCt P
COPPE P,, 11
/ G)' i I /i
COPPER POL.- IN OPOLE