The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1898-10-31
REVOLUTION IN TELEGRAPHY
SCIENTIFIC METHOD KNOWN AS
SINE-WAVE.
General Greedy Believes New System
Will Increase Very Materially
Working Capacity of Cables.

Washington, Oct SO.-One point in the
annual report of General Greedy has es-
capped public attention owing to its dis
association with the late war 1t relates
to the discoveries of two young physic-
lists. Prof A. Crehore and Lieutenant
Colonel George o. Squier volunteer sig
nal officers, who have lately pursued, IN
der the direction of the chief signal OIL
Ger of the army. certain Sclentlnc IN
veStigatiOns that promise to work a revo-
luton in methods of ocean biography.
General Greedy expresses his belief that
these discoveries and inventions have as
sumed such form and phase as TO be of
world. The discoveries outline the true
scientific methods of telegraphy. known
as the sine-wave system The first eX-
periIpentS were made at the artillery
school, Fort Monroe. Va, and We're dis
cussed theoretically in 1897 under the title
of the -synchronograph. new method
of rapidly transmitting information by the
alternating current. The next step was
the testing of this system on a long tele-
graph line, and for this purpose. Prof.
Crehore and Colonel SQuier visited Eng
land where they were afforded every IA
cility for experimental work over the
government telegraph line. through the
courtesy of the postmaster general and
the distinguished electrician. Chief En-
gineer Preece.
The experiments. the report sets forth
proved conclusively the superiority of a
the typical form of which is a simple
Sine-wave. as compared with the system
now exclusively used throughout the
world in code telegraphy. Under the sine
wave system, words were sent and re-
ceiVed over a line 100 miles long at a
rate of over 5000 words per minute. I'm
der this new system the speed OF the
WheatstOne commercial receiver was in
creased as much as three-fOld when oD-
Grated under identicaliy the system of the
old code biography. The superiority or
sine-waVe having been decided by eX-
perimental apparatus. the next step is to
construct transmitters for actual CON-
mercial conditions Two special appar-
atuS were devised. one for operating lana
lines and the other for the transmission
of messages over long cables. The cable
transmitter was completed and land in
struments advanced when the late war
interrupted progress, which has only late
ly been renewed by direction of General
Greedy.
The first practical tests of the cable
transmitter have just been made through
the courtesy of George Clapperton and
other officials of the Commercial Gable
company of New York. The experiments
were made over the cable between New
York City and Canso. which had length
of S2I knots and electrical resistance OF
Is, 700 ohms. and an electric distributing
capacity of 81 microfards These tests
were made between Sept % and Oct. l6
1898.
The change from existing telegraphic
methods consists in the substitution for
the present appliance of a transmitter
sending smooth waves. such as are OBJ
tanned in alternating currents working
without making any other changes what
ever in the elements of the present svs-
TEN. The conditions in the transmission
of MESA geS over long cables are distinct
" ord widely different from those on
aerial lines. The necessity of increased
Spoou over ocean cables. the report con-
tinues while not generally appreciated,
is strikingly obvious when examined from
a commercial standpoint. Since every ca
bic spanning the Atlantic costs several
million dollars. the value Of any discOv-
cry that will increase the working power
of these cables is at once apparent. Cen
eral Greedy says he has TO hesitation IN
expressing his opinion that the sine-wave
system. which also admits of easy duplex
ipF. viii within year or two increase
very materially the working capacity of
every cap-e 10 which 1t is applied