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

CELERITY OF DISPATCI BY CHAPPE TELEGRAPH. 45
result has followed the labors of others down to the present
time.
" We may at present," says Mr. Jules Guyot, from whom
much of this description has been copied, " without changing
anything in the exactitude of the signals, and without changing
anything in the mechanism that produces them, double their
number. We may raise them to 82,944 words; parts of, or the
whole of phrases, by two signals expressed by 4, 5 and 6 movements; and we may devise plans to establish the Chappe telegraph by night as it is by day. Thus the resources of the telegraphic art are far from being exhausted, and to accomplish
these ends the inventive mind can be directed."