New-York tribune., 1907-10-18
N4RCONTS PROGRESS.

In several particulars MarcOni's latest at
tempt TO initiate regular transatlantic cOmmu-
nication is more promising than his interesting
venture nearly five years ago. The inventor
believes that he has practically overcome the
paralyzing influence of daylight on ether
waves and his tests seem to have been con
tinued long enough to warrant popular faith III
the achievement The long distance station
recently erected at Clfden on the west coast
of Ireland is about two hundred miles nearer
to Cape Breton than is Poldhu. in Cornwall,
his earlier base of operations for long range
work. Finally. he now employs more power
full engines TO drive his generators than he
did in 1902 and 1908 These improvements do
not afford positive guarantee Of success. to
be sure, but they impart a hopeful aspect to
the new undertaking.
Having had other objects in view. Marconi
has given little attention thus far TO incrcas-
ing the number of words which he can trans
nit in a minute. Twenty is said TO be his pres
ent maximum. Some of his rivals are credited
with the ability 10 maintain considerably
higher speed than this. and it is not unlikely
that eventually Marconl himself will find more
rapid work feasible. Apparently, however, he
cannot yet match the submarine cables in this
important respect If he is unable to handle
the business of a single cable il would OBJ
NIOuNlA De lulloSSlble LOT Hllll 10 ldht iudI VI
the twelve or thirteen now in service between
America and Europe, even If it were offered to
him. II does not look as if there would be
formidable competition between the two sys-
tens of telegraphy Immediately.
Among the influences which will tend to
limit the expansion of the wireless teleGraphlc
industry is the danger Of interference between
impulses transmitted simultaneously in the
same field of activity. 1t was long ago dis
covered that inconvenience from that cause
could be lessened by regulating a generator
so as to develop waves of a certain frequency
and adjusting the receiver 10 respond more
readily to that rate than to any other. OBJ
viously. then il is necessary to find out how
many rates can be employed at once without
interference, and that is a question to which
electricians have recently given much study.
In the engineering supplement Of The London
Times DR.. J. Erskine- Murray said two or three
weeks ago that appreciaDle progress was being
made toward a solution of the problem. Ac-
corling to that authority, something more is
involved in tuning than control Of the num-
Der of waves generated In a second. If means
are also adopted 10 regulate the shape Of the
waves-that is TO give sharpness TO their
crests-an additional gain may be secured.
Under those conditions, it Is asserted, small
difference in two frequencies will insure non
interference,
hint OF other advantages than the pre-
vention of accidental interference is here af-
forded. Perhaps by imparting special form
to ether waves it may be practicable TO lessen
the chances Of stealing and of malicious dis
turbance. How far Marconi has gone In Sc
curing such protection does not yet clearly ap-
pear, and possibly further developments may
dispel some of the hopes which to-day seem
WaTrantable.