Evening star. [volume] (Washington, D.C.) 1854-1972, 1929-06-16

Until civilized population centers grow large
enough. to demand the wire, however, the Mar
conf short-wave wireless which the Portuguese
government maintains between Loanda, on the
West Coast and Mozambique, on the East Coast,
will continue to tie those outposts of civilization
to each other and the rest of the world.
When the wires are at last strung along the
paths pioneered by radio they Will be telephone
wires as well as telegraph wires, for one wire
does both jobs-another outcome OF the
scientific research in which radio. telephone
and telegraph companies share Radio waves
and the electrical impulses flowing through
wire are the same thing, they have found.
Radio waves guided by the wire-carrier cur
rents as they are called-need not interfere
if of different wave lengths. So we find single
copper wire carrying telephone messages and
20 kilograms simultaneously! The Western
Union has announced that it does not intend
to string any more wires in the United States,
but instead will rent carrier current channels
from the Bell Telephone system.
Before the end of 1929 look for a new way
of sending messages by radio or by wire. The
facsimile method of transmission has passed
the laboratory stage. In the New World all
letters, documents, drawings, maps and the
like requiring speed in delivery will be sent
electrically Set sheet of paper in front of
a photo-electric cell, throw light on 1t, con-
meet up the circuit, and what you have written
on the paper is reproduced in a minute or so
at the other end.
GGT KNOW John never sent that telegram"
said a country woman In one Of the old
rural melodramas. cit amt anything like his
Writin'" But New York bank paid check
transmitted in facsimile by radio from London!
The courts may have to rule on the validity of
such ng-distance signatures but for most
purposes they win prove good as II sent by
mail
"Eighty-five per cent of mail matter requires
no more secrecy than the radio or the tele-
graph affords" said DIR. Alexanderson to me.
''In the future the air mail VIII be used for
only the small proportion of letters which re-
ouire absolute secrecy. With facsimile trans
mission there is no chance of error; the most
important contracts can be sent cheaply and
with accuracy. ANY sort of private code which
can be put on paper can be used If desired
Payment win be by the square inch instead of
by the word Complicated mathematical
formulas, diagrams, anything which can be
shown in black on white viii be transmitted
with absolute certainty.
Advertisements requiring a particular style
of type and display have already been sent
across the continent in this way. look for
ward to the time when matter will also
broadcast to an entire chain of newspapers
The latest Paris fashions sketched at the Long
champ races can be in the workroomS of New
York dressmakers in an hour And in this, as
in all other modern developments in electric
communication, radio viii do the pioneer work"
Radio to blaze the trail, wires for the heavy
traffic. Radio win be less reliable than the wires
until we learn how to control sun spots, the
aurora borealis and other extramundane
phenomena which throw the circuits into con-
fusion Long waves or short waves, directed or