Evening star., 1923-04-12
BENT STAR RAYS
BEAR OUT E|NSTElN
Relatively Proved by Photos
Taken in Australia Dur
ing Eclipse.
BY the Associated Press

By the Associated Press.
SAN JOSE, Calf, April 12.-Dr. AL
bert Einstein's theory Of relatively
experiments made by the Lick Ob-
servatory expedition. which photo
graphed the eclipse of the sun In
Australia last year, that no further
experiments will be made. DR.. w. w
Campbell, director of the observatory,
announced last night.
Photographs of stars made at night
on the Island of Tahiti three months
before the eclipse, and pictures of the
same stars, taken in conjunction with
the photographing of the eclipse at
WallaI on the northwest coast of
Australia, on September 81. 1922,
show a bending Of the stars rays, DIR.
Campbell said, as close to the amount
prescribed by the Einstein formula
as "the most ardent proponents OF
Einstein's theory could hope fer"
The average DETECTION on three sets
of plates measured, the observatory
director said, was 1.1o of second OF
an arc. The measurements covered a
minimum of sixtytwo and a maxi
each pair of Photographic plates.
Scores of Stars Recorded.
1.-TWO photographs of the eclipsed
sun and it's immediate surroundings
were obtained in Australia with each
of two specially designed and con-
structed cameras, with lenses having
apertures five inches in diameter and
focal lengths of fifteen feet" DR..
Campbell said in explaining the ex-
pertinent.
THE four sensitive plates, each
seventeen inches square, recorded the
images of several scores of stars in
though in reality these stars were
many million times as far away from
us as the sun. The same cameras
were used three months earlier on
the Island of Tahiti to photograph
the same. stars when they were in
the night sky and without the sun
in their midst
For the first time in twenty-five
years. on the date of observation the
day was clear. Twelve Photographic
plates brought back to the obseTva-
tory turned out to be satisfactory and
afforded excellent bases of measure
ment. DIR. Campbell said.
Prof. Einsteins theory, according
to DR.. Campbell and other western
scientists is, however. much more
light is bent in passing large celestial
bodies. The theory, in it's larger
proportions involves a radical change
in attitude toward the nature of the
Of the elements Of the theory is
that light is a substance and because
Of that is attracted by gravity.
Weight and RepelIfng Power.
Some of the interpreters Of the
theory also maintain that by virtue
of the same quality that makes 1t
subject to the pull of gravity it has
repelling power because of its
weight.
There is also involved in the theory
the assumption that the pull Of grav-
ity on any substance varies with the
velocity of that substance in motion.
Light, being presumably the most
tenuous form Of visible matter is less
subject to the force of gravity than
more tangible substances.
The Einstein theory of RELATIVELY
in discussions among coast astrono-
mers gets it's name. it is explained,
from the fact that it deals with time
and space as relative things, distance
having meaning only in the relation
of objects to each other in space. The
same. it is alleged. is true of time.
it being measured by the relation
Of events and subject to motion for
it's existence as a method of measure
ment.
Important to Science,
AS far as the man in the street is
concerned, DR.. Campbell does not ex-
pect his confirmation of the Einstein
theory to make any appreciable diff
ference. 1t will' not affect base ball,
taxes or prohibition. But in astrono-
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