Evening star. [volume] (Washington, D.C.) 1854-1972, 1930-12-31

Plant Industry, who made the expert
ments, said that preliminary tests indi-
cate an increase OF frequency OF
mosaics A plant mosaic is produced
when one or more characteristics ex-
change places This Is one of natures
steps in changing species.
The number of fnosaics increased the
longer the plants were exposed to the
magnet. DR.. Sprague found. Certain
semss also were observed.
Mans first visual evidence of the
earth's curvature, photo which saw"
$40 miles, was exhibited last night.
The picture was taken recently from
an a!rplane in South America, showing
level pampas stretching ahead for near
ly 800 miles, ending in a long range Of
the Andes, and behind them. $40 miles
from the plane, the peak of the volcano
Aconcagua.
The distant horizon line of the PAM
like a photo OF the curving edge of the
moon.
Tracing the Just distinguishable curve
with his finger DIR. G. E. K. Mees, d.
rector of research of the Eastman Kodak
Co., said that there is science IN
photography not yet realized even by
most scientists.
The earth's curvature photo was made
possible by development Of photograph
ic plates sensible to rays OF light invisi-
BILE to the eye. The picture was taken
by Capt. A. w. Stevens, U. S. A., who
pointed his camera in the direction OF
the mountains, although he could not
see them.
Human Eyes Keencr.
Experiments showing that human
eyes are still ahead of photo electric
eyes for detecting light through tele-
scope were reported by DR.. Joel Steb-
bins of the University OF Wisconsin.
| Because its size is smaller, the human
| eye gets more good out OF the magnif1-
cation of lens, and in telescope sees
| objects FIVE to six times fainter than
the bigger photo-electric eye can de-
tect
Single electrons, regarded as the
smallest things in creation, still are
beyond the tangible grasp of physicists,
bat 80 electrons at time have been
measured.
They constituted a tenuous electric
current, flowing at the rate of 80 cleo
irons a second This gossamer strip
of energy was caught and measured az
curately with a pliotron tube by DR..
l.. A. Du Bridge, assistant professor
of physics at Washington University,
ST. Louis.
Radio as storm DetectOr.
The often heralded reading OF coming
storms In the strength of radio signals
has been reduced to workable rules by
Prof Robert Cameron Caldwell of the
| University of West Virginia. They APP
ply TO the area between MorgantoWn
and Pittsburgh, so miles north, and are
read on the signals from Station KDKA,
Pittsburgh.
A good way to get the most profitable
Malaga grape in California is to thin
the leaves to q maximum of 80 for each
cluster of fruit. This thinning pro-
duces better size and quality, said DR..
A. Winkler of the University of Cali
fornia. Still further thinning gives
even larger grapes, but reduces their
number toO much for usual CONNER
cial purposes.
Use of radium to give fleeting green
and violet CLOVIS to certain heated
minerals was d scribsd by Frances G..
Wick OF vaseae College. Prof. Wick
satu some natural crystals may have
been colored in some such fashion in
the earth by radiufn CARNATIONS under
heat end pressure.
| A certain type of radiation from
onions has always been easily detected,
but scientists now can photograph q
photographs Of the new. radiation.
which were made At tha physical