New-York tribune., 1922-11-17
sleeping Illness
Cause Is Found,
Says Flexner
animals Contract MaIady
That Has Puzzled Science
From Pare Solution of
the Human Cold Sore
Hopes for a Cure Rise
Measuring Sea by Sound
and New Phone MarveIs
Described TO Scientists

Progress In determining the cause
VI encephalitis, or sleeping sickness
rhich was prevalent here after the in
suensa epidemic, was announced yes
serday by DR.. Simon Flexner, of the
Rockefeller Institute, at the final ses-
son Of the convention of the National
Academy of Sciences.
Physicians and scientists have hith-
srto been ignorant OF the origin of the
mysterious disease, the distinguished
research worker told his colleagues,
but it has recently been discovered
that rabbits, when inocuiated with the
pure solution of the human herpas, or
Z cold sore develop sleeping sickness.
From this fact it has been deduced
that the inflammation OF the mem
branes Of the nose and throat, which
is usually present at the same time
rs cold sore is in some way con-
nected with the inflammation of the
membranes of the brain which is
known to exist during ans attack of
sleeping sickness.
May Lead to Cure
Further than this, DIR. Flexner said,
nothing has been ascertained as to the
exact cause or cure of the disease, but,
with this discovery as starting point,
progress can be expected toward OBJ
tanning knowledge to cope adequately
with the malady.
EIectronic tabes. which will make
possible radio teler hony with higher
power than has been available, were
described by Dr. H. w. Arnold, OF the
Western Electric Company, at the
scadenly's afternoon meeting at the
Engineering Institute. DR.. Arnold
showed a number of the big tubes ca
pabie of handling from ten to fifteen
kiioWatts, and described their construc-
tion, made possible, he declared, after
twenty years experimentation, by the
discovery that an air-tight joint can be
made between copper and glass. These
tubes, he added, probably were the
largest that ever will be desirable, for
though it would be possible to cor
struct them in 1000 kilowatt sizes, it
would be useless TO do So since the
aDtennae of the present wireless sta
tioDs could not stand such high cur
rents. Only few Of the big tubes
Will be necessary to operate even the
largest radio stations, and the type has
so far progressed from the expert
mental stage that the Western Electric
Company Is now manufacturing them
for commercial purposes.
Five Talk at Once for Two Wires
Demonstration of how one electric
current can carry another was made by
h: II. Colpitts. assistant chief engineer
ofSthe Western Electric Company. BY
the use OF actual apparatus, such as is
found iii many parts of the Bell Tele-
phone system, Mr.. Colpitts showed how
single pair Of wire could conduct as
many as five simultaneous telephone
conversations. AT present, he said,
about 5000 miles Of the Bell system
are htted for Carrier current" circuits
and are making use OF the device with
large saving OF wire facilities. since
they allow all five conversations to take
place OH two wires, instead of three
conversations on four wires, the maxi
mum under the former methods The
device1 however, he added. was re-
stricted to Tse on open long distance
tool circuits, and consequently was not
not likely to revolutionize the tele-
Phone system as much as did the loaded
cable.
Sound Measures Sea Depths
High tribute was paid by scientists in
the audience TO new method fer de-
termining ocean depths, described by
Or. Harvey Cornelius Hayes, physiciet
Engineering Experimental Station, at
Annapolis, Md
DR.. Hayes's invention, which he said
Y