The Democrat-herald., 1922-05-12
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PROGRESS OF RADIO
THROUGH THE YEARS
Wireless Research Began Long
Ago, But Development Has
Been Swift Lately.

Wireless research started many
years ago, ms far back even MS 1877.
Even the radio telephone is not II re.
cent perfection; rather 1t Is that intro
duction to the luyman OF the human
voice and music has suddenly popular
lied something that wireless men had
thought a pastlme or amusement. Here
is the chronological record oi wire.
less:
lS2T-It was found that the mag
netic discharge from lcydcn. jan
would magnetic Il steel needle.
1881 - electromagnetic induction
was discovered between two entirely
separate circuits by Michael Faraduy
lS37-Cookc and Whentstone OF
London. England, and Morse of the
United States take out first patent for
electric telegraph.
1S3S-k. A. Stcinlcil Of Munich
suggested that II system Of wireless
tclcgrnphy could be established after
his discovery of the use of the earth
return.
1Si0-Joseph Henry U. S. Az pro
duccd the first hlgli-frequency clcc
tric oscillations. and statch that the
condenser discharge is oscillatory.
1872 = Wireless experiments We're
= made by $. +. Il. Morse by electric
conduction through water across
Washington canal and across wide
rivers.
1Si3-A wireless system for trans
atlantic communication was suggested
lsIs-Niatnr
ing medium in wireless experiments
across n wide river.
1Si9-Intelligiblc signals were net
ually sent across II river 1890 feet
wide in India, but the cost was found
prohbitivc for commercial use.
1SG1-'rhe electric waves that are
now utilized in wireless tclcgraphy
and telephony were predicted in m
-uddress before the Royal Society In
London. England.
lSsU-rhc sending of an electric cur
rent through earth was systematical-
ly studied by John Trowbridgc OF
Harvard. II was found that signal
ing might be carried on over large
distances between places not connected
by wires.
ISSJ-lt was found that telephone
speech could be conveyed by induction
over space of quarter mile. TINS
experiment took place in England.
flSSg-Electric waves were sng-
gested as being particularly suitable
for the sending of signals through
fogs.
1s92-An instrument for the detec-
ton of electromagnetic waves was
discovered which was given the name
of "cohcrcr."
lSgl-A scientist OF Berlin signulcd
through three miles OF water.
1S95-niglI frequency waves excite
curiosity of Senutore Marooni.
lSo6-First patcn, for practical
wireless transmitting system is taken
out in London by Mnrconi. Aftcrward,
successful signaling was carried out
over distances us great as one and
ncquartcr miles. Sir William Preeco
Of the British postoflice system in
tcrcsted his cohorts in Marconfs wire
less experiments.
Marconi establishes communi.
rullOn NttNttI I'lhtS l'hi 'A'''' We
tant. Balloons were used TO suspend
antcnnae.
Marconi demonstrates his wireless
system before the king Of Italy, com
municating with two Italian wnrsh'ps
nine miles distant.
The first Murconl station is erected
on the Isle OF Wight and experiments
conducted over a distance Of Ii miles.
Near the end of the year the first
floating wireless station was success.
fully operated.
1s9S-Thc first paid marcOnigram
was sent from the Isle of Wight
station.
1S99-Rcports made on lighthouse
accident by radio. First French gun.
boat is fitted with radio apparatus, In
Vienna communication between two
balloons is established. New Norl;
Herald receives radio report Of inter.
national yacht races. The British war
office Introduces MIrConi apparatus
into the South African battlcfClds,
I9OO-Gcrman vessel communicates a