Evening star., 1924-04-29
MARVELLOUS EXHIBITS
IN NATIONAL ACADEMY
Coolidge and Members View Sci
entific Devices in New
Building.
MEETING HEARS PAPERS
MEETING HEARS PAPERS
Gen. Squier Predicts Future Elee-
trical Wonders.

Exhibits at the new building Of
the National Academy OF Sciences
and the National Research Council,
dedicated yesterday at 21st and Il
streets, with President Coolidge at
tending, today divided the attention
Of those attending the second ses-
sion of the annual meeting Of the
academy.
Those exhibits arc a dream come
true, for long before the corner stone
Of the building was laid members or
the academy discussed them. and how
they some day would enable "the man
on the street" to see the practica-
bility and beauty OF both pure
science" and applied science
Installed in rooms around the main
auditorium, the various scientific de-
vices attracted attention along with
the many highly technical papers
which are being read at today's meeting.
Each scientific device is accompa-
MED by a printed card telling IN
plain language the purpose and his
tory of the test and full direction
for operating. BY pressing lever, or
key, the spectator may put the ap-
paratus Through it's PAGES" and se>
vividly and concretely matters which
hitherto he may have accepted mere
II as things Of pure speculation
Delicate balances of which the Wis
itor may have read, having an al
most unbelievable ability to detect
minute differences, are made to weigh
infinitesimal differences as he stands
before them.
Famous Vacuum Tube.
On another stand the visitor ma!
see DR.. Lee de Forests three-element
vacuum tube, universally known ana
used in modern radio reception, anG
see for himself how the plate" heats UP
Visitors were unanimous today ia
stating that there is nothing like
these exhibits anywhere else, aimed
as they are to both tell the layman
and demonstrate themselves to him
From the swinging gold globe in the
center of the auditorium, mute evi-
dence of the constant movements OF
the earth, to the models of dinosauT
the new building is a mine of interest
Visiting scientists exclaimed TO-DAY
at the marvellous view afford I'd from
the entrance of the new building.
looking as il does across to the Lin
coin Memorial. Water is now in the
three small terraced pools in front
of the Academy of Science building,
harmonizing with the rejecting pooi
at the Memorial.
Among the many scientific papers
heard at today's meeting of the acad-
envy was one of particular interest
by Maj. Gen George o. Squier, L. :.
A, retired, former chief signal officer
and inventor of devices and appliances
in conlfction with radio and cable
work.
Great Cable Speed.
Ger. Squier predicted that ult.-
mateIy a speed and accuracy IN
thought of at present" will be at
tanned in ocean cable transmission
through the adoption of electron
vacuum tubes for cable as well az
radio communications.
ANY one hearing the address was
enabled. by stepping into side room.
to see the vacuum tube previously
mentioned in full operation. Gen
SQuier said that experiments ALREADY
made have resulted in great progress.
This work has been carried on in
connection with the Seattle ketchi-
kan Army cable. Much of the work
has been carried on in the labora-
tory Of William NJ. Bruce, .Jr, az
Springfield, Ohio, and by the bureau
of standards here.
George +. Putnam, commissioner Q!
lighthouses, read paper on Radio
Fog Signals for the Protection o.
Navigation" Frederick L. Wright.
geologist, associated with the Car
negie Institution, told of portable
gravity meter which would be usefu
in measuring the vibration Of earth
tremorS.
W. 3. Greeley, chief forester OF t.s
United States forest service, will ad-
dress the academy at sis O'Clock to
night on a scientific background for
Other addresses will be made by }.
H. Breasted. John c. Merriam, shes-
ter Stock, Alex IIrdlicka and Henry
Fairfield Osborn.
The final session will be held ar
o'clock tomorrow.