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

212 HISTORY OF THE ENGLISH TELEGRAPH.
tr acted by theo electro-magnet, which will carry the right-hand
pallet away tlom the pil wheel, and which will then move by
the action of the weight upon the barrel B, until it is checked
by the left-hand pallet, which had advanced to the wheel at the
same time the other receded. This single operation has moved
the disk one division, and the armature is still attracted. Now
let the disk, o, be turned until the spring, e, has been passed
by the rib, and is in contact with the ivory only, instantly the
current ceases; the armature, F, recedes from the magnet by
the action of the spring, o; this has taken the left-hand pallet from the pin wheel, which is permitted to move until the
next pin strikes against the right-hand pallet. This has now
Fig. 33.
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