New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1904-10-16
lIR. FIELDS INVENTION.
Ne7o AmpLfer May Completely
Change TeLegraphic Methods.
- rErraRAPH 10 - rR1RrNr.l

tBY TELEGRAPH TO THE TRIBUNE.l
Pittsheld. Mass. oct. 15.-Stephen Dudley Field.
e nephew OF Cyrus Field the protector OF the At
lantic cable has made an invention In Stockbridge
which Will. IT IS said. make the wireless telegraphy
capable OF handling commercial business OF large
scope as readily business is handled over
the old system Of wires This invention is an aP-
paretus which takes up the slightest OF cleo
trio currents and records messages on paper tape
BY the Morse code. Furthermore Il IS declared to
be practicable. and IS TO be used steamships. IN
lighthouses At wireless stations. or the coast or
inland as soon as suitable stations have been pro-
yided
1t is an instrument which Increases the range
OF the wireless dcId and completely changes the
present methods Of receiving messages by the wire
less systems. Mr.. Fields calls his invention an
ampliher. Il Is a machine OF wire coils and mag
nets so adjusted as TO record all variations in the
electric current which passes through II. One OF
the most novel features is the OF threads OF
glass -thousandth Of an inch in diameter 10
truss and connect OF the smaller parts Tho
current is turned into the amplAer aud the
Is clicked out in printed Morse characters on the
tape.
The ampliher is said 20 be nothing but a n,echan,
cal microscope for electricity. The same ampItAer
applied 10 ocean cables WILL II Is further declared
more than double the present speed Of transmission
and Will allow the connection OF cables and wire
less or land lines direct, so that message NAV
1e sent around the world by one operator without
its oelng repeated from station TO station The in
venier declares that all the attachments now in
ma ha
made by the ampliher available for any wireless o9
ocean cable system. By OF il a land iins
This means message might be sent ShPosSb eI,b 9y
waves IRON London across the ocean 10 NeW-York
and there turned into wire and carried without In
corruption 10 San Francisco.
TWO methods OF receiving wireless messages bava
been employed hitherto. When the innpulses ara
strong they be recorded on a pauer tame brt
when faint telephone is necessary In practical
service the latter is more commonly used II Mr.
Fields apparatus is more sensitive to Hertz waves
than other forms OF receiver IL should nrov.
valuable adjunct 10 apparatus previous v inven.ed
The currents employed In submarine cables are
also exceedingly feeble Messages received over tba
latter once registered by Lord Kelvins .sinho,
recorder" but they also made visible nv the
swaying of beam of light in a dark room through
the oscillation Of tiny mirror mounted on AN
electro magnet Here. aFan, is a large field for i'm
provement. The essential feature OF Mr. Fields
''ampliher seems to be more exquisite sensitive
than is possessed by these kindred devices
The claim that II viii prove helpful TO cable teerra
ply certainly is credible.
In submarine cables peculiar cloggiug effect Is
observed, whicn puts limit on the frequency with
which the dots and dashes follow one another
The trouble has been partially overcome and higher
speeds are now more possible than formerly In
telephony the waves set by the voice are so close
together that the difficulty Just mentioned has pre-
cluded conversation over lines more than nifty or
one hundred miles. One of Professor Pupin's in
ventions was designed to remedy the evil Inas-
much as 1t would be necessary to Introduce his
choking coils at short intervals I'm cable To
secure the desired result. the expense would he
great. For that and for other reasons the attempI
has not vet been made. II il should be found that
the clogging could be sufficiently reduced by means
of an instrument connected with end OF the
cable, transatlantic telephony might become prac-
ticable in the near future. Apparently the cable
device