The Hawaiian star. [volume] (Honolulu [Oahu]) 1893-1912, 1900-01-25
ELECTRIC SPACE SIGNALS
NEW INVENTION IN MARCONTS
WAKE.
inventors Getting Marvellous Results
in Space Communication Without the
Aid of Wires-Kite Tests.

Inventors seem nowadays to have en-
tered competition to see who shall de-
wise the greatest number of applica-
lions of electric space-signaling. Among
those recently reported is the invention
of A. F. Hamilton for facilitating ap-
proach to the harbor of Halifax, n. S.
The Electrical World reports that tie
apparatus consists of what may be
called an electrical buoy on which IS
bell connected with the land by means
of a submarine cable. In addition to the
bell the buoy is intended to hold Mar
conf transmitter from which signals
may be sent from land to distance OF
four or five miles" All vessels having
suitable receivers can thus be readily
warned of danger as they approach TIE
coast and can also ascertain their eX-
act situation by paying due heed TO uhe
signals transmitted. Other appli cations
of wireless signaling systems are thus
noted in the same paper.
I'm a despatch from Chicago, unuor
the head of 'Marconi Tests Are ont
DONE an account is given of tests Of
wireless telegraphy by Prof. W. ).
Johnson and c. L. Fortier, of Milwau-
lee. What these gentlemen accomplish
ed according to the information at
hand, is this: They succeeded in tele-
graphing without wires through
! suite of seven rooms, with all doors
closed and through seven walls. An
other test was made, when the signals
were conveyed through three fireproof
vaults and an ordinary telegraph
switchboard, in which thirty wires
| We're connected up and about forty
dead wires were located. Notwithstand-
| ing the fact that this switchboard con-
! tanned live wires, the current passed
| through all of the vaults and through
this board. This probably is the most
severe test ever given wireless tele-
graphy. A third test was made, in
which the sending instrument was
placed inside of one of the steel vaults
and both doors were closed and the
combination lock turned. The signals
were then transmitted clearly from the
| inside of the vault to an adjoining
ROOM The professor claims that his
! invention is materially different from
| that of Marconi, and that an instru-
ment can be constructed to be carried
On horseback. Other information tells
of another system of wireless telegra-
ply tested at Lexington, KY. by Prof.
! G.. r. Sturtevant. The system, Profes-
sor Sturtevant says, possesses qualities
superior to Marconfs system, in that
instead of transmitting in waves which
travel in every direction sent, the mes
sages are sent in parallel lines in two
directions, and can not therefore be
taken Unfortunately by persons not
| intended to receive them. The system,
he says, originated in England"
In an article on the applications of
kites to this form of signaling, Elec-
tricity says
"Of the various kite experiments of
recent date none have investigated the
subject as carefully or as thoroughly
as William A. Eddy. In studying
the workings of the Marconi wireless
biography, Mr. Eddy is said to have
come to the conclusion that a kite wire
would be far better adapted to catch
ing electric oscillations in the atmos-
phere than Marconrs wires attached to
| poles driven in the ground.
"Mr. Eddy is Furthermore of the opin-
ion that If the two vertical points of
sending and reception extend high
enough into the air, enough electricity
will be obtained from the atmosphere,
even in a clear sky, to do away with
the batteries now made use of. Whether
| Mr.. Eddy is correct in his surmise can
of course only be determined by eX-
perimenting, and it is along this and
kindred lines that he has been working
! of late. Among other things he has de-
vised a sparkling apparatus which,
when attached to a kite and sent up
four or five hundred feet, can be made
to emit sparks by means of atmosphe-
ric electricity, at one-second intervals,
or much more rapidly If desired, and
in this way Mr. Eddy believes war
signaling aloft could be carried on"