The sun., 1915-02-21

virtues Of long life ana exquisite SEN
s!tiveness combined with an enormous
saving In cost. In place Of the Ave-
ton rotor. which have Just men
toned. have u superior substitute
which does no; weigh more than Q
couple OF pounds,
My oscillator Is not yet ready for
the market. nor am I prepared now
10 divulge .ts details l shall do so.
however. as soon as my patents issue.
but In the meantime l must withhold
particulars which would probably con-
fuse the layman and not serve tho
purpose of this Interview. In the past
| have had 10 nght for my invention.
more than once because OF unt!mely
publicity that permitted rivals 10 file
patents inspired by my disclosures
and those battles have cost me need
.essly large sums 10 win the fruit. ~
my years of experimental research,
The oscillator. mind you. Is for pro-
duct!on OF ether impulses or Hertz!an
waves and Is a modification OF a kin
dred apparatus intended 10 pick up
or 20 receive the undulations sent out
by other stations
Il want you 70 sea tho receiving
instrument, even though I shall ask
you 20 refrain from describing ~ with
any detail, for this part OF my system
is at the commercially developed stage,
and from It's workings you will get an
idea OF its future application. To-day
Wa shall be able to pick up the sig
rails OF the different wireless messages
travelling through the atmosphere OF
Manhattan. and those that we do no;
want 10 hear can all be- silenced so
far az we are concerned. for the dots
and dashes OF any particular station
We wish TO listen TO-"
Dr. Hewitt then led the way 70 hts
laboratory near tine top OF the tower
Of Madison Square Garden. The room
was filled with electrical apparatus
Immediately IN front OF the visitor.
upon "a table crowded with dry batter
les. cells. measuring Instruments, a
web OF wires. &C, was n novel devei-
opment o. the Hewitt mercury vapor
lamp or arc, and this was 20 installed
that II became the responsive inter-
nediary between the myr!ads ot wire
less Impulses IN the air and tho opera
tor who desired 10 listen IN"
After DR.. Hewitt had the arc work
Ing to his satisfaction no and his
guest placed the double receivers OF
telephone headgear upon their ears,
A moderate toned sound could be heard
arriving In long and short periods
which answered. cor the dots and
dashes of an ordinary telegraph key.
by moving a little knob longthwise
upon slotted slah with fiankinE cop
por buttons or contacts DR.. Hewitt
seemed 70 change tho pitch of the
sounds heard: but what ne actually
did WAS 10 tune the receiver 30 that
II would catch the distinctive keynote
OF first one and then another of the
various sonding stations.
The pitch of these tones indicated
the wave lengths OF the dcspatch,ng
SPARKS near or Ear as tho caso misit
bo some OF the notes were not un-
like tho spring song of Il wooing frog,
while others were as thin as the buzz
of mosquito or az deep as tho hum
~ BUNDLE bee. Merely moving the
knob Of the dctector, so to speak, suf-
feed % shut ont all other notes or
Impulse save those exactly IN tuno
with the receiver 50 modified IA: VIII
, b" the inventor, In this fashion pr.
Hewitt will bc able to adjust his APP
paritus for wireless telegraphy 80 that
he can pick up impulses OF the highest
froquenclcs or wave lengths and be
equally awake 20 those at tho lower
end of the register, In fart Nh ey-