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

386 VAIL'S PRINTING TELEGRAPH.
M and MI, by the support f and f, from which proceeds a bolt passing between the coils k and k, and the block h, with a thumbnut upon it, by which the whole is permanently secured. In
the same manner the left-hand magnet is secured to the block
Fig. 5.
_ 0e
ll^illltTll\lllllllTllllll^ J I ili jllilllili ^ J1Slilil lElllljill iii/ [ I [ T i,: I..........i.... _
M. R/ is the outside portion of the brass frame containing the
clockwork. w is a standard fastened to n', for supporting the
pendulum Y. x Y and 1 are parts common to a chronometer
for measuring the time, viz., the escapement and pendulum.
The escapement-wheel has 24 teeth, corresponding in number
with the type on the wheel, and such is the arrangement of the
parts, that when the pendulum is upon the point of return,