The Iowa plain dealer. [volume] (New Oregon, Howard County, Iowa) 1867-1895, 1889-01-24
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SCIENCE AND INDUSTRY.

Cases have been observed Of restor.
alton OF the voice after considerable
destruction Of vocal chords. It seems
TO show that they are mere duplicat-
ures OF elastic membrane and not spe-
cial structure. -Fooss Health Monthly.
London Truth says that the art Of
the working goldsmith is disappearing.
owing to the cheapness Of diamonds.
Every one who buys an ornament in
sists now upon precious stones, and e.
Inmates it rather by the value OF the
stones than by the beauty Of the work
manship.
when the rosewood tree IL first
cut, the fresh wood exhales very
strong, rose-like fragrance, which soon
passes away, leaving no trace OF the
peculiar odor. There are esveral varie-
ties of rosewood trees. Tho best, how
ever. are those found in South America
and tho East Indies and neighbOring
islands.
The new explosive now being man.
ufactured in Germany is called secunte.
It is described as a granulated powder
of a light yellow color, with IN odor
resembling that Of bitter almonds. II
is quickly manufactured, does not de-
teriorate and costs about the same as
dynamite and is OF nearly equal explo-
sive power. It can not be fired by fric-
ton, blow or jar. only strong fuiminat-
ing caps producing the explosion.
A new life-boat. which Is supplied
with reservoir or oil In order to sup
port bodies in the water, is based on
the recent cases of successful expc-
riences with oil in overcoming the
power of the waves. The reservoir in
this case is provided with an outlet.
BY means Of which the oil may escape
automatically, no matter on which side
the float. or buoy. may be turned when
thrown into the water.
"A microscopic examination OF
great number of specimens Of ancient
paper. dating back to the eighth CEN
tury, has shown them to have been
made. as now, from rags, and not from
new fiber. The most common con-
structed is linen; but cotton, hemp, and
animal fibers have also been detected.
Furthermore, it is discovered that many
OF the samples are ''clayed" with starch
paste.
Iron. when heated, bends very
readily under weight, SO that it can
not be considered the best OF material
for fireproof buildings. Stone. and
especially granite. is very little better
than iron to withstand the ravagns Of
fire. There Is no material, according
TO the best fire insurance authorities,
that can be used for construction equal
to brick. 1t is the opinion OF both in-
surance men and heads Of fire depart
mcnts that brick has stood the test bet
ter than any other material.
One Of the troublesome questions
which architects have never been able
to settle is the placing of permanent
foundations under large buildings.
The latest experiment, according to
the american 1rchitecf. il to cover
before commencing the footings--
the entire area OF the excavation OF the
building with a thick stratum OF con-
crete. laid directly upon the top OF the
clay hard-pan. The depth of this
course is nearly two feet. and its OBJ
iect is to strengthen tho clay that the
settlement may be reduced to mini
mum.
A recent analysis OF the potato
shows that the starch in the tuber is
chiefly formed at comparatively lato
period Of its rowth. In an early stage
the experimcnter found Of ash 1913 and
OF starch l6.4. The same variety
yielded when near maturity but 10 OF
ash and 24.4 starch, showing that the
proportionate increase OF starch toward
the end of the growing season was
very great. There il much less water
in Il potato tuber toward the end Of its
growth than in the earlier stages. II
is from these facts that new potatoes
are more waSy than those that arc
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