Burlington weekly free press. [volume] (Burlington, Vt.) 1866-1928, 1903-01-01
NOT STRICTLY NEW.
Wireless Telegraphy Since It's Dawn
Sixty Years AGO,


1s42-Prof Morse sent signals across the
Susauehanna river without metallic con-
nections of any sort by means of wires
stretched along the banks
1&9-Scptember. James Linsday, of
Dundee. read a paper before the British
Association stating that IL wires were run
along the coast of America and Britain
and charged by batteries, he could send
messages from Britain to America
1s6+-December s. Clerk Maxwell defined
at the Royal Society the ether waves to
certain extent and showed that wireless
telegraphy would be possible by means
of the electromagnetic waves the velo-
city Of which he concluded was the same
as that of light, conclusion which has
subsequently been proved correct.
lH9-Prof ID. Hughes found that
microphonc in connection with the tee-
phone produced sounds in the latter when
the microphone was at a distance of sew
eral feet from coils through which a cur
rent was passing.
lSs5--Sir William Preece, Of the General
Postoffice, London, sent currents between
two insulated squares Of wire, each side
measuring 40 yards and the squares were
a quarter Of a mile apart.
1ss6-Sir William Preece also sent sig
nails between two parallel telegraph wires
four and a half miles apart
1sS7-Prof. Hertz discovered that when
jar across an air gap sparks would also
pass across a gap In circle or square
of wire held away from the jar. The
discovery showed that the ether waves
streamed out from the spark gap in every
direction.
lSS'-Sir Oliver Lodge obtained his first
successful signalling results carried out
with what he termed the syntonic cir
cults. the coherer principle forming a
part of the experiment.
1S90-November "a. The first notice of
the coherer invented by Professor Branly
appeared in Complies Rendus, the coherer
consisted of metal filings.
1S92-Sir William Preece established reg
ular communication between F'latholm
an island fort in the Bristol Channel,
and Lavernock. on the Welsh coast, three
and third miles distant.
ie94-Dr. Rathenau and Professor Reu-
bens signalled across the Wannsea at
Potsdam, a distance Of three miles. u.s.
ing a base line $50 feet long. The message
was passed by means of earth currents.
lSo7-Mr. Marconi sent signals from La
vernock to Flatholm and introduced the
high wire or aerial.
ls9S-Mr. Marconi's wireless system hav-
ing been reported on favourably by Sir
William Preece it was established be-
tween the Royal yacht Osborne and Os-
borne House
lSsa-Professor Braun took out patents
abroad in connection with wireless tele-
graphy.
| lSe9-Professor Chunder Bhose read a
paper before the British Royal Society
on the action of coherers.
1sOl-December. 81 signals received by
Mr. Marconi at Hospital Point, New
| foundland, from CornwSH.
l92-February. The Philadelphia re-
NAMED in communication with the Mar
| conf station at Poldhu for IA distance of
| 1550 miles.
19G2-December. Actual wireless tele-
graphy communication established be-
tween Cape Breton, Canada, and Corn
wall, England. dispatches being sent by
the Governor general of Canada to King
Edward. to the King Of Italy and to the
London Times.