The Providence news. (Providence [R.I.]) 1891-1906, 1902-03-11
Diamond Dyes SSiSe SsSer aGsihqS & SeSeE s9E ffads
Will Not Supplant Gables.

WIZ NoV bupPi"he N""Aoo'
At meeting in London of the Eastern
Gable company the statement was made
that the company had nothing 10 fear
commercially from the development of
wireless telegraphy. Along this same line
l.. A. Herdt. professor OF electricity in
McGll university, Canada, In speaking
on the Marconi wireless telegraph said in
part;
From work lately published in
France by NM. Boulanger and Ferrier.
officers I'm the French army engineers.
and comments thereon by distinguished
scientist of Lavel university. from
whom we borrow In part. we are led TO
conclude that the possibility OF the sys-
TENS interference with cable lines is
entirely unfounded. The authors of the
work we allude TO are known throughout
Europe as 'savants and experts I'm the
application OF electricity in all its
branches And that which adds especial
value TO the opinions they express is their
utter disinterestedness After experiment.
ing in wireless telegraphy themselves, on
different occasions, they were present last
7 a
between Toulon and Corsica. Consequent
~ they speak after seeing for themselves
with their special knowledge on the sub
ject.
After mentioning the greatest dis
tance covered by the Marconi experiments
In his autumn trials, after alluding TO the
improvements successfully made in his
apparatus, especially in the matter OF
'synthonle. which allows, when the dis
tance To be covered is sufficiently great.
the sending of several messages simul-
taneously in different directions, the
authors said
. Notwithstanding these improvements,
the principal objections TO wireless teleg-
raphy still subsist:
- Insecurity of communications.
80 Necessity of constructing very
high supports for the antennae from the
moment that the distance to be covered
is at all great
"'3 Cumbersomeness and sensitiveness
OF the apparatus.
The first of these objections Is the
most serious, and, unfortunately, so far,
II does not appear to be possible 10 re-
move Il entirely II the fact that mes
sages can he intercepted IL not very
important objection. owing TO the possi-
bility of using cipher codes. the same can
| not be said about the fact that the recep-
| tiun of a message can be interfered with
I
siderable distance of. Moreover, I'm warm
! climates (and why not in warm weather
| anwhere?) the reception OF telegrams can
| be very much disturbed by atmospheric
! perturbat tons
The necessity Of employing very high
/ supports for the sntennae IL no great oh
lection on shipboard. where. moreover,
| there is no occasion generally Of corre-
/ spending at great distances. But such is
not the case when working from land.
LAS a rule. communications are more
difficult over land than whore the sta
tions are separated by water IL was
| thus that the trials made I'm the Transvaal
gave no practical results. Good COM
munlcations can. however. be made on
lard with sufficiently elevated antennae.
| But beyond 80 TO 80 metres In height. the
construction OF supports presents great
difficulties. Recourse must, then, he had
| to captive balloons: but these are at the
mercy of the winds.
! :" IT follows. therefore. that the pro-
grcss obtained by Msrconi. though i'm
I por,ant. does not yet allow wireless tcleg-
/ raphy 10 supersede the processes hither.
! To I'm use Whenever possible IL VIII al
ways be preferable TO employ existing
methods which possess the great advan'
tage Of simplicity Nevertheless. in many
cases. wireless telegraphy viii be q
| precious complement 90 the other. and
ought not. therefore, 10 he neglected. Al
sea- for instance. II would be the onh
means OF communication and II IL easy
10 imagine circumstances when even or
| land no other means OF telegraphins
would be available especially In militarJ
operations.
"It IL In this field that the practical
use OF wireless telegraphy must he
sought. and the progress accomplished
since It's inception warrants the hope that
the aim Of It's adopts may soon be at
| tanned
'The only possible Inference from NM
| Roulanger and Ferrier's observations 10
| that valuable ss Mr.. Marconis work may
be there II no prospect OF wireless teleg'
| raphy replacing the systems now In use
/ Its usefulness being alongside ~ and rs
| an adjunct TO the latter. but not At al
In antsgonism thereto. Boston Trans.
= FnPssy cf contrast ihs Ensii,h homs