The next day the following editorial notice appeared in the New York "Herald":-- MORSE'S ELECTRO-MAGNETIC TELEGRAPH This important invention is to be exhibited in operation at Castle Garden between the hours of twelve and one o'clock to-day.

One telegraph will be erected on Governor's Island, and one at the Castle, and messages will be interchanged and orders transmitted during the day.
Many have been incredulous as to the powers of this wonderful triumph of science and art.

All such may now have an opportunity of fairly testing it.

_It is destined to work a complete revolution in the mode of transmitting intelligence throughout the civilized world._ Before the appointed hour on the morning of the 19th, Morse hastened to the Battery, and found a curious crowd already assembled to witness this new marvel.

With confidence he seated himself at the instrument and had succeeded in exchanging a few signals between himself and Professor Gale at the other end on Governor's Island, when suddenly the receiving instrument was dumb.