New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1911-08-06

, crar+ed q few reasonable doubts the whole
thing comes well within the realms OF pos
| sible fulflment.'
ITO show 70 what extent wireless teeg.
ranbv had developed in the nineteen years
which have elapsed since Sir William
! Crookes's prophecy was uttered, Marconi
IN the summer Of 1896 demonstrated thu
onerat,on Of his system OF four miles for
| the British postal authorities. and on Juna
. 1896. he made application for patent.
which was granted about one year later,
| July Q 1897.
During 1897 Marconi successfully ex.
changed signals at a distance OF eDous
nine miles, and in the next year distance
of thirty-four miles was reached In $50
communication was successfully established
between England and France, aooc.
thirty-two miles and between two British
men-of-war about sixty miles apart
shortly after this in the same year Mar.
conf came to America 10 report the Inc
ternational yacht races held of New York,
and subsequently his apparatus was In
stalled on several vessels Of our navy for
experiment The first communication BY
wireless was carried on between the New
York and the Massachusetts, at a distance
| of forty-seven miles.
The recent Brant Rock experiments,
conducted under the direction OF the Navy
Department, are the most extensive opera
tions Of this character whose results haYs
vet been published. From these expert,
ments we have found means OF generating
electric waves of any desired length, and
have also found out what wave lengths
are best for any given distance We ara
| also in a fair way toward being able 70
design sending apparatus, including mas''
and aerials. whose radius Of day com-
munication we can guarantee with a given
power expenditure. Night communication
is not as certain as day communication
because Of certain peculiar atmosphere
changes which occur after darkness sets
| I'm.
Referring 10 a statement OF Sir william
Crookes, regarding people who might wan'
to find out what the other fellow was DO
| ing and attempt TO steal messages from
| the air. Sir William says: considering
there would be the whole range Of waves
10 choose from. varying from a few feet
| TO several thousand miles he believed
| there would be sufficient secrecy, for the
| most inveterate curiosity would surely re-
| coil from the task OF passing In review al
the millions OF possible wave lengths on
the remote chance Of ultimately hitting
! on the particular wave length employed by
those whose correspondence Il was wished
to tap However. practical considerations
have limited the number OF wave lengths
now In use.
"The wave length is the problem IN Wire
| less There IS sufficient range OF possloe
wave lengths TO provide any needtul COM
| muncation, # fixed stations only were
! necessary. but since the principal use ana
developments of wireless telesraphy have
/ been with and between ships at sea, which
| are continually moving and varying theF
| distances from each other and from shoIs
| stations, the problem is by no means
! simple one.
Wireless teleeraphy has already been
/ the subject OF two international confer
ences. and a third is to convene in London
! either this year or I'm 1912.
1.-THE second international conference
held i'm Berlin i'm 1906, established wave
lengths OF 800 and 500 metres for shore sta
lions for general public use and also pro-
vded for the use of any wave length oe-
tween 300 and 600 metres for ship stations
with 800 metres as n standard for COM
municaton between ships and shore STA
tons.
Wave lengths between COO and Low
metres We're reserved for naval and otheE
government stations. and wave lengths
greater than 1900 metres were reserved ioF
special shore stations. each station 70 %
assigned a particular wave length IS
might be directed. Congress has not YET
ratified the recommendations OF this con-
| ference. and until II does the United states
IS not party TO IL. though II participates
In the conference
WILLIAM 1. ALTDORFEh