The Red Cloud chief., 1888-04-20
SCIENCE AND INDUSTRY.

The picking and drying of black
berries forms an important industry in
North Carolina
The averay. daily wages pail to
| New York sewing women is fifty cents
| for fifteen hours work.
The curious fact that the usual heat
produced BY friction is absent when the
| articles are magnetized is just now be-
ing discussed by scientists. VIII" are
seeking An explanation.
"A physician recommends that all
the wood used in the interior con>;ric-
ton of houses. and all the plain sur
faces Of plaster. should be thoroughly
oiled or vanished. 80 that the power If
absorption of foul air and gases Sholll
be destroyed.
1t is estimated that about 5D.or0.0D
Sounds of cottOn-seed oil were u>el in
the United States during last t in
the adulteratiOn Of lard. and that it
was mixed with about twice rs mach Of
other material. most Of which WAS pure
lard with the leaf left out.
Recent researches by Prof. Brown
Sequard demonstrate that u liquid Oh
tanned from the vapOr of air from the
lungs is 20 poisonous that u dos of
swenty centigrammes Qess than four
grains) sufficed to kill dog in abou,
seven hours.
"A writer in Science comes to the
AOnO1sv that ~ N yaS,,tt nf hi, in
vestisatiOns ''it seems lille To discuss
further the influence of forests upon
rainfall from the economic poin; "f
view. as it is evidently too slight to b.
Of the least practical Importance. Man
has not yet invented u method Of con-
trolling rainfall"
Berlin has gradually become the
headquarters of the carved-wood in
dustry. supplanting Switzerland. Six
hundred artists in Woodworking. the
same number Of turner's. and seven
hundred carpenters are engaged in TIE
production of such articles as cigar
cases. newspaper and picture frames.
napkin-rings. etc. The value If the
annual export Of these tribes is pu; at
1880 900.
1t is found that living creatures
brought up from sea depths If four
miles or more. suffer greatly from the
changed conditions of pressure and
temperature. AT those vas: depths the
pressure is tremendous. and the tenn
p%erature is comparatively low. Tn
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 mines are usually more accessi-
bic than the quartz. and do not require
sOgreat IN amount of material for their
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 hea: loses its
magnetic properties. it hal only lately
been determined by direct measure
ment at what actual degree of tempcra-
ture iron ceases to be u magnetic body.
By his experiments he showed tina. iron
remains magnetic up to $50 degrees C..
after which q 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.