The Abbeville press and banner. [volume] (Abbeville, S.C.) 1869-1924, 1889-02-13
POPULAR SCIENCE,

The movement of glaciers in summer Is,
four times that made in winter. ~ !:
Bars of wrought iron will expand or
contract 151200th Of their length for
each degree Of heat. ..,....s ..-....:,.', ',
One ton of coal is capable of yielding
an amount of force equivalent to that Of
six and two-thirds men. s.... 'sas
The tooth with which young cobras!
cut their way through the egg is shed as.
soon as it has served its purpose. .
There is no material, according to the
best fire insurance authorities, that can
be used for construction equal to brick. :.
The new electrolytc treatment of cop,
per solutions in Spain results in seventy,
eight per cent. pure electrolytic "copper"
It is startling fact that from one.third! !
to one.half of all persons born into the
world die before reaching the age of five
years. '.".'.@ - 3s.'. ""' =
In testing forty.two boys between nine
and sixteen years of age for color blind
ness not one made an error in matching
the colors. ...,..-.'-.,..., .y.,
The preservation of rails 10 use is, due
to the formation of magnetic, oxide pro,
duced by the compression of the rust on
the metal. d. y.,. iiiw 7ii -
AS the moon revolves around the earth,
it also makes just one revolution on itS'
axis, thus keeping the same side always
toward the earth. " rH' = o
A French subterranean river has been
explored for mile or more by H. Martel,
who derives from his Investigations q
theory of the origin of canons. zrGas .
DR.. Kruss, a chemist of Munich, has
succeeded in decomposing, cobalt and.
nickel, both of which have hitherto been
supposed to be elementary substances.
Choose such a place for emptying
carboys, or any other containers Of acid,
as will suffer the least injury should the
vessel be broken, or any OF the acid be
spilled. ~ ',.'' '''' ' :,
Professor Ayrton estimates that, the
power wasted at Niagara Falls exceeds
that which could be produced by the
annual consumption of 150, 900, ,0Ou tons
of coal. 2. ..s a.,r4i J.
The microscope often reveals impuri-
ties in diamonds, particles of organic
matter and bubbles of gas being COM
mon. Quartz, chlorite, pyrite, hematite
and topaz have also been seen. 'I,'' g. :,
The scientist Leuwenhock says that
he had often compared the size of the
thread spun by a full grown spider with
hair from his beard, and estimates that
it would require more than 100, spider
threads to equal the diameter of this
hair. -. ,,.,a
The latest things in torpedo boats in
France is the Gymnots, a submarine
craft propelled by electricity. She can
be driven under water at fair rate Of
speed, and in her latest trial made q run
of 100 feet when submerged to a depth
of twenty-five 1eet. A half hour is the
longest time she has thus far remained
under water. 90 ~ s''sS'
There is strong evidence that wood
subjected for certain length Of time TO
the heat of steam pipes may eventually
reach state of carbonization. when,
with the addition of moisture, exposure
to a draught of air or under the inhut
ence of friction caused by expansion and
contraction of the pipes, it may break
into fame. .',' '"' .:s'.'.. .T'D"
1t is said the largest gun in the British
Navy is capable of throwing projectile
weighing 1900 pounds at 9. velocity Of
over q mile in four seconds, the
momentum being equal to that of 81, 213
tons of metal falling one foot. It re-
quires $40 pounds of powder to, fire this
shot at this velocity, so any one. rersed
in the prices of steel and saltpetre can
calculate the cost of every shot that these
guns will throw. 1t will be found to be
about $1,000. ... zee. . \