Evening star., 1901-02-09

course the use Of the apparatus will entail
a new system of construction In telephone
and telegraph wires. Our telephone wires
of the future will have one of Prof. Pupn's
coils inserted at certain intervals along the
line of commune alton. For this reason, q
revolution in the present system of cabling
cannot take place at once. new cable
must be laid. Pupin cable 1t may be cali
ed which will differ from the ordinary
cable by having perhaps thousands of these
little induction coils attached to IL. With
his 80 miles of telephone or telegraph
circuit Dit can be used for either purpose),
Prof Pupin has demonstrated to the satis-
faction of experts that his system Is entire
ly practicable
Company have sufficient faith in the inven-
ton to make a purchase of IL for half q
million dollars and to guarantee to the in
ventor annuity of 81 800 1t is their pur-
pose to install the system on land wires,
and ii is proposed soon to lay another At
lcEtic cable after the Pupin pattern. Up
TO the present time the longest distance ac-
complished for telephony is some 800
miles, but Prof. Pupln anticipates no diff
Guilty in telephonng several thonsand
miles. Already experiments have been
made looking toward the application of
teegraphy at the rate of 1.Wo words n
minute with the rapid telegraph in
strument attached to this apparatus. and
there seems to be no reason why success
should not follow. Indeed, Prof Pupin
says that the experiments have already
shown that rapid telegraphy in connection
with this system is an assured fact.
Far-Reaching Results.
At any rate. the present tedious method
of cabling will be superseded by at least
the speed and method of ordinary land
telegraphy. With Prof. Pupin's apparatus
a much larger proportion of the energy i'm
parted to the transmitting end of the cable
will be received at the other terminal. and
the rejecting mirror and sine wave method
Will be unnecessary. Messages may be sent
ana received through a transatlantic cable
as readily as message can now be sent
from New York to Philadelphia. More than
that, ocean telephony Is possible. We may
talk with friends on the continent as read
lily as we now talk over a distance of a few
miles. The present improvement Is OF
more lar-reaching Importance, in that the
easier means of communication will bring
ABOUT cheaper rates for ocean and land
messages. Indeed the ina agination NAV
carry one far in the attempt to limit the
possibilities of such a simple apparatus as
thiS invention proves to be. And vet as
mas been pointed out, Prof. Pupin has not
so much revolutionized present systems as
ne has improved upon them.
several months ago Prof. Pupin was an
preached by one of the telephone compan-
les, Whc wanted to secure the benefit of his
patent, but they were unwilling to paw the
very modest sum which the inventor was
then willing to take. Since that time thew
nave had occasion to regret their action in
tHe matter, as the present arrangement for
lhe use of the invention gives TO Prof
Pupin very much larger return than he
mad formerly asked. The inventor is sin
working on his apparatus in his LABORATORY
dt Coiumbla, and doubtless further i'm
proVements in its working capacity will H..
secured. Prof. Pupin is very modest about
ms success, and dislikes the notoricty
"hlch II mas brought upon him.