The Republican. [volume] (Oakland, Md.) 1877-current, 1888-04-07
SCIENCE AND INDUSTRY.

oAihS ana drying OF black |
oerrles forms an important industry in
North Carolina.
Inc average daily wages paid to
New lork sewing women is fifty cents
for fifteen hours work
line curious fact that the usual heat |
produced by friction is absent when the
aftlcles are magnetized is just now be-
ing discussed by scientists, who are
seeking an explanation.
"A physician recommends that all
the wood used in the interior construc-
ton OF houses, and all the plain sur
faces OF plaster, should be thoroughly
oiled OF vanished, so that the power of
absorption of foul air and gases should
be destroyed.
1t Is estimated that about 80. 100000
gounds OF cotton-seed oil were used in
the United States during last year in
the adulteratiOn of lard, and that it
was mixed with about twice rs much of
other material, most of which was pure
lard with the leaf left out.
Recent researches by Prof Brown
Sequard demonstrate that liquid OBJ
tanned from the vapor of air from the
lungs IS so poisonous that dose of
twenty centigrammeS Qess than four
grains) suiiced to kill dog in about
seven hours.
I\NN ter in Science comes to the
c1ns1 Hat as result of his in
vestigatonN sit seems idle to discuss
further theinhuence of forests upon
rainfall from the economic point Of
view, as it isevidently too slight to be
of the least PRACTICAL Importance Man
has not yet Invented method of con-
trolling rainfll."
Berlin ha gradually become the
headquarters d the carved-wood in
dustry, supplaniug Switzerland. Six
hundred artists in wood-carving, the
same number q turner's, and seven
hundred carpente's are engaged in the
production of snh articles as cigar
cases, newspaper and picture frames,
napkin-rings, etc. The value Of the
annual export of ihese tribes is put at
81, $50, 900.
1t is found that living creatures
brought up from sea depths of four
miles or more, suffer greatly from the
changed conditions of pressure and
temperature. At those vast depths the
pressure is tremendous, and the tenn
perature is comparatively low. On
being brought to the surface, the deep
sea creatures are sometimes torn in
pieces by the powerful expansion of
their organisms occasioned by decrease
in pressure, and sometimes they abso-
lutely melt away before the eyes Of the
beholder'
The secondary nature of the gravel
deposits in which placer mines occur
implies that they are found at an
average lower altitude than the quartz
veins, from which they are derived by
erosion The average height of placer
mines is about 5000 feet, the highest
being 10000 feet above the sea level.
Owing TO their mode of formation,
placer pfnes are usually more accessi.
BILE tlSs}ha quartz, and do not require
so great an amount of material for thei1
workings.
M P. Ledeboer said before the
Academy Of Sciences in Paris that al
though it had long been known that a
magnet raised to u red heat loses its
magnetic properties, it had only lately
been determined by direct measure
ment atwhat actual degree of tempera-
ture iron ceases to be magnetic body.
BY his experiments he showed that iron
remains magnetic up to $50 degrees c.,
after which rapid variation is noticed
in its magnetic condition. At $50 de.
grees the magnetic properties are
scarcely perceptible, while at 40 de-
grees they disappear altogether.