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

50 TREUTLER IMPROVEMENT OF SEMAPHORE TELEGRAPH.
Fig. 8. lower indicator of the (lay telegraph, so as to give a light in
both directions. He also pro/ 8N \ posed to use lanterns on the
Chappe telegraph, by placing
A /o / A two white lights at each extremity of the regulator, and
two bright green lights at the
extremity of the indicators. By
means of an arrangement of
these lights the Chappe telegraph was made to serve for
the night. Fig. 8 represents
the signals on the right oblique indicating signals 10 earth,
and 10 sky, and in. which all the lanterns are outside of the
mechanism, illustrating the day telegraph transformed into the
night.
Fig 9. THE TREUTLER IMPROVEMENT IN SEMAPHORE
TELEGRAPHING.
\ /, Mr. Treutler, of Ber- Fig. 10.
—. lin, constructed a sema-
phore telegraph to be e f
used principally in the <.:.I
railway service. Fig. _~ 1 ~"9 represents the whole ----- _
mechanism invented by -. —-'/
him. It was a mast...........
with a single pair of'........
wings. These movea-......... -—...ble wings were furnished with two series of
mirrors as represented in fig. 10, designed
to reflect the parallel to the line, and in two
opposite directions.