Evening star., 1927-04-28

land, Me-. being 81 centimeters above
that at st. Augustine.
On the Pacific Coast Seattle was
found to be 26 centimeters above san
Diego in mean sea level.
The spreading Of new world Ion
gitude net by radio time signals was
described by F. B. Littell Of the Naval
Observatory. Very slight corrections
have been found necessary in the
United States from the old longitude
lines established 80 years ago.
Describes Gravity Methods.
C. H. Swick of the Coast and Geo.
detic Survey described methods for
determination of gravity at sea, and
%. S. Adams of the same service de-
scribed the progress made in the work
of adjusting triangulations in the
Western half of the United States.
Neil OgiIvie of the Canadian Geo.
detic Survey described the recent
progress of geodesy in Canada and
C. v. Hodgson of the Coast and Geo
detic Survey spoke on triangulation
work in the West.
Radio reception as it is associated
with periods of sunspot minima and
maxima was the topic of discussion
at the meeting Of the terrestrial mag
netism and electricity section of the
union. There is a relation, it was gen
orally agreed at the symposium, but
changes in one cannot be used to pre-.
dict changes in the other in the pres
ent state of experimentation.
Steady Sun Spots.
Although the sopts on the sun have
been increasing for the past few
years, and studies have been made as
to how they correlate with radio re-
ception and the earth's magnetic and
electrical conditions, no exact rela-
tionship exists, said DR.. Louis A.
Bauer of the Carnegie Institution. The
earth's magnetic activity does not
cease during years of minimum Of
sunspots, he said.
G. w. Pickard, Boston radio en-
gineer, held, however, that there is
a definite relationship between the
conditions of the sun and radio re-
ception, especially if the averages
are taken over extended periods. The
mean of 70 passages of large sunspot
groups over the center of the solar
disk show that magnetic disturbances
are in direct line with the earth, he
claimed.
Rode Through Storm.
Lieut.. E. II. Kincaid of the United
States Navy told of the work he has
done in correlating static with at.
mospheric conditions. He rode
through the Miami hurricane with
the U. S. S. Kittery several days be-
fore it struck Florida and found that
static was most intense in the center
of the storm, a low atmospheric pres.
sure area. In the area of high pres
sure that followed, he said, static was
almost absent.
H. n. Heck of the Coast and Geo
detic Survey explained the purpose
Of the symposium and DR.. G. G. Alb
bot. acting secretary of the Smith.
sonian Institution, described regular
periodicities of solar radiation re.
vealed by the long-continued observa.
tions at the Smithsonian stations.
Two Washington men are in the
list of members elected yesterday to
the National Academy of Sciences
which was given out today. This is
one of the greatest honors that can
come to an American scientist Will
liam Bowie, chief Of the division OF
geodesy, Coast and Geodetic Survey
an authority on the crust of the earth
and Claude Silbert Hudson, chemist
at the United States Bureau of Stand
ards, were SO honored.
Edison Is Honored.
Among others so honored was
Thomas A Edison, Americas most
celebrated inventor.
A continual line Of persons was pass
ing through the National Academy oi
Sciences Building to view the tele
vision exhibit today. This exhibit, the
first for the general public. will con
tinue for the rest of the week, every
step of the process being explained
by experts of the Bell laboratories.