New-York tribune., 1907-10-25
LETTERS TO THE EDITOR
TESLA ON WIRELESS.
Electrical InUentor Thinks MdrcOMIS
Plants Inefficient.
To the Editor OF The Tribune.

To the Editor OF The Tribune
Sir; In SO far wireless art is concerned there
is vast difference between the great inventor
Ihomas A. Edison and myself. integraly in my
favor Mr.. Edison knows little of the theory and
practice Of electrical vibrations: 1 have, in this
special field, probably experience than any Of
my contemporaries. That you are not as yet able
10 impart your wisdom by wireless telephone to
some subscriber in any other part of the world.
however remote and that the presses Of your val
ua bic paper are not operated by wireless power s
largely due to your own effort and those OF some
of your distinguished confreres of this city. and TO
the efficient assistance you have received from my
celebrated colleagues, Thomas A. Edison and
Michael l. Pupin. assistant consulting wireless en-
gneers. But II all welcome to me. Difficulty
develops resource
The transmission across the Atlantic was not
made by any device Of Mr.. Marconis. but by my
system of wireless transmission OF energy, and
have already given notice by cable to my frleno
Sir James DeWar and the royal institution OF tiis
fact I shall also request some eminent man OF
science to take careful note Of the whole appa-
ratus its mode Of operation. dimensions. linear and
electrical. all constants and qualitative perform
ance, to make possible its exact reproduction
and repetition OF the experiments. This request
is entirely mpersonal am citizen OF the United
States and I know that the time will come when
my busy fellow citizens, too absorbed in CONNER
cial pursuits to think of posterity. VIII honor my
memory. measurement Of the time interval
taken in the passage Of the signal necessary TO the
current crosses the ocean with a mean speed OF
700 miles second.
The MarconI plants are inefficient. and do not
lend themselves TO the practice OF two discoveries
of mine. the art of NATURALIZATION" that makes
the message mountaineering and non-inteTferaoie
and the Stationary waves" which snnihhate as
tance absolutely and make the whole earth equiva-
lent 10 a conductor devoid of resistance. Were It
not for this deficiency. tho number Of words a
minute could be increased at will by individual
izing"
You have already commented upon this advance
IN terms which have caused me no small astonish-
mont in view of your normal attitude. The under
lying principle is to combine number or viora-
tions preferably slightly displaced to reduce
further the danger Of interference. active and
passive. and make the operation OF the receiver
dependent tho cooperative effect of number Of
attuned elements Just to illustrate what can be
done. suppose that only four vibrations were iso-
lated on each transmtter. Let those on one side
be respectively q. b. C and d. Then the following
indivduaIized lines would he ab. ed be. bd. Cd
abe add acd bed and abed. The article on
the other will give eleven similar combinations
and both together twenty-five lines. which can be
simultaneously operated. To transmit one thou
sand words a minute only forty-sx words on each
combination are necessary. II the plants were
suita BILE, not years Edison thinks, but ton
hours would be necessary to put this improvement
nso practice. To do this. Marcon VIII have 20 re-
construct the plants. and u will then be observed
that the indefatigable italian has departed from
universal engineering customs for the fourth time
New York Oct. q, 1907. NIKOLA TESLA