Juniata sentinel and Republican. [volume] (Mifflintown, Juniata County, Pa.) 1873-1955, 1900-02-28

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Ice will reach . lower temperature
than 81 degrees II the temperature of
the air 10 less than that. 1t Will take
practically tAs temperature Of the at
mosphere.
Liquid hydrogen 10 transparent. and
the lightest as well as the coolest liquid
known. . cork sinking in 1t like lead.
A whitish substance seen at the bottom
Of the vessel on Prof. Dewar's first ex-
hibition was really solid air or air ice.
The multiplication Of new compounds
N organic chemistry Is something ap-
ptA.ing. In 1888 the total number Of
carbon compounds recorded was 10000.
but a newly revised list by DIR. NJ. NJ.
Richter enumerates not less than
$1,000. and the end seems yet far off!
A Canadian engineer has invented
foghorn in which the noise Is produced
by half a dozen clappers striking
gong and actuated by electro-magnets.
A dynamo. supplied with power by q
naphtha engine. furnishes the current.
About 800 strokes per second fall upon
the gong, thus producing practically
continuous sound, and this is magnified
and governed IN direction by a mega
phone. A small model Of the horn Is
said to have made itself audible at q
distance of two miles.
Recent investigation of the old prob
lem Of the diffusion of tin over eastern
Europe and Asia Minor In prehistoric
times, leads to the conclusion that
about a thousand years before Christ
the tin of the British Isles was csrried
overland to the Aegean Sea. The In
vent!on Of the anchor led about 2.7U0
years ago to the opening Of a marine
route between England and the eastern
end Of the Mediterranean, and then the
Phrygians controlled the tin trade with
their ships. The short summer nights
Of North Britain were among the won
iers that Greeks talked Of in the days
IF Homer.
According to the recent studies Of
signor De Sanctic. Of Turin, children
begin to dream before their fourth year.
but are unable to recall dreams before
the age Of 4 or 3. This age, he con-
,ludes. Is that at which a child first be-
comes distinctly conscious OF self.
Aged people dream less frequently and
less vividly than the young. Women's
dreams are more frequent. more vivid
and better remembered than those Of
men. Criminals and delinquents dream
much less frequently and much less
wildly than other people. Two-thirds
" the most depraved criminals exam
Ined by Signor De Sanctis were never
conscious Of dreaming. This is ascribed
TO lack Of mental activity.
Studies Of the planet Jupiter during
the opposition of 1899 have afforded
some new figures concerning Its rate.
or rather rates. of rotation. These fig
ures do not affect the round numbers
in which the equatorial velocity Of Ju-
pliers rotation is usually stated. viz.
about 2s,O0O miles per houh. But they
furnish additional proof that the mo-
tions visible on the great planets sur
face are not uniform from year to year.
Since the spring Of 1897 the equatorial
region appears to have experienced an
accelera ton Of velocity. Relatively to
the surface some 30 degrees north or
south. Jupiters equator rushes ahead
with hurricane speed. between 200 sand
300 miles an hour-in itself sufficient
Indication that what telescopes show Of
Jupiter Is not a solid crust but layers
and masses of restless vapOrs.