Freeland tribune. (Freeland, Pa.) 1888-1921, 1894-12-17
SCIENTIFIC AND INDUSTRIAL.

Fossil biaons have been unearthed
in Kentucky.
Porcelain is to be substituted for
gold iii filling teeth.
The whale is warm blooded, air
breathing, milk-giying animal.
Bedroom windows should never DO
entirely closed il the person occupy
ing the room is strong.
When ants show great activity it may
almost be invariably depended upon
that rain will follow within twelve
hours.
"Tissus Microblcides, warranted to
keep out the most preserving bacillus,
are being sold by some of the chief
Partisan shops.
Indian corn, or maize, never has an
uneven number of rows OF grain, be-
cause it has opposite radicals of growth
from the co-center.
One of the new rifles used by tho
Italian soldiers sends u ball with force
enough to go through five inches of
solid oak at II distance of 1000 feet
According to M. Flammarion, the
great astronomer, the mean tempera-
ture of Paris for the past six years has
been two degrees below the normal.
AGerman officer has invented q motor
in which fine stream OF coal dust is
utilized to drive piston by explosion
in the same manner as the gas in the
gas engine.
Aluminium bronze consists of ninety
per cent. copper and ten per cent.
aluminium, and possesses tensile
strength OF 90, 900 pounds. 1t can be
worked in the same manner as steel.
The idea of an ancient tropical con-
tinent mt the South Pole, uniting South
America, Madagascar and Australia,
continues to arouse considerable in
teresG and discussion III scientific
circles.
Professor Dcwar has demonstrated
that metals augment their magnetic
qualities and increase in strength by
diminution of temperature. Iron Mt
$50 degrees can endure double its nor
NAL tensile strain.
There is n mystery about the method
Of motion of condors that has never
been explained. They have been seen
to circle to and fro in the sky, half
day Mt time, rising and descending
without once Tapping II wing.
Touch the convex side of watch
glass upon water SO as to leave drop
hanging on the glass. Pour u little
ether into the concGye side and blow
upon it. The rapid evaporation of the
other will render the glass SO cold that
the drop of water will be frozen.
Lieutenant +. Boyer, of the French
navy, to avoid collisions, proposes to
introduce at tine top on all fast sailing
steamers an electric light which will
cast beam ahead to Indicate the di-
rection in which the vessel is steering.
SO long as the approaching ship was
not in the actual pencil of light it
would be unnecessary to alter her
course.
A new authropometric test of sensi-
tiveness has been designed by DR.. Gal
ton. A band OF color, showing all the
sixty-fve shades of blue, is slowly
passed before the eyes, and the sub
iect makes a dot for every shade de-
tected. AS far as the experiments
have proceeded only about twenty
shades are generally discovered. In
one case, however, dyer detected
about forty.
A fish exerts its great propulsive
power with it's tail, not its fins. Tho
pGddlewheel was made on the fin
theory of propulsion, and the screw
propeller had its origin in noting the
action of the tail. 1t is now shown
that the fins of the tail actually per
form the evolutions described by tho
propeller blades, and that the fish in
its sinuous motion through the water
depends on the torsional action of tho
tail to give it power.