Martinsburg herald. [volume] (Martinsburg, W. Va.) 1881-1920, 1892-06-11
POPULAR SCIENCE.
In all artificial light the waste is over

In all artificial light the waste is over
ninety per cent.
Se~venty-three per cent. of the railroad
passenger cars of Massachusetts are heated
by steam.
There are 413 species of trees found
within the limits of the United States
and Territories.
The banana yields a larger supply oil
food for man than any other plant on a
similar extent Of ground.
1t has been scientifically demonstrated
that the earth's axis once every 437 days
uDdergoss a distinct oscillation.
The microscopes say that a mosquito
has twenty two ''teeth7 in the end OF its
bill-eleven above and the same below.
The corporation Of Glasgow, Scotland,
is about to erect a generating station
large enough to supply 40, 900 incandes-
cent electric lamps.
In testing the conditions of the atmos-
phere inside a petroleum tank, if the air
at the bottom is found not infanmable
or explosive the air above is sure not to
be so.
A new cure for hydrophobia was sue
cessfully tried in the PIsteur Institute at
Milan, Italy. 1t consisted of a subcu-
taueous injection of the virus in IL
liked form"
An English paper proposes new spray
ing machine that will deliver the spray
under cover SO that the wind will not
disturb it, and also one that will raise Up
the vines aud thus permit the spray to
reach all sides.
A further great reduction in the cost
of aluminium has been hoped for by NJ.
Faure, whose process consists in obtain
lay cheap aluminium chloride and de.
composing it electrically. fine chlorine
would be a valuable bye product. The
commercial success of the plan, however,
is not yet assured.
1t has been fouul that By passing
mixed hydrogen and carbonic oxide over
nickel and cobllt they can be separated.
Then By applying the hydrogen to STRIPS
of platinum, a powerful primary battery
is formed which will yield, it is stated,
fifty per cent. of the total energy In the
hydrogen absorbed.
An installation of electric light is be-
ing laid down in the Bltignolles Tunnel
near Paris, France, in which the mean
descent lamps are placed at a height of
about fifteen feet above the rails. The
light is received by plates of FURNISHED
tin covered with glass, which reflect a
soft and agreeable light into the carriages.
Long distance photography is rendered
quite successful by a new camera with a
telescope objective, which consists of a
concave lens of short focus and a convex
lens of considerable length of focus.
These are put at a certain distance apart,
depending on the difference of the two
foci. BY the laws OF optics this arrange
mont P~IVjovts an invnr.ed image of m
object at a long distance from the lenses.
A photograph by DR.. Gill, presented
to the Paris Academy, shows from
80, 600 to 40, 900 stars, besides two
nebul@, in an area of four square de-
grees. The exposure was over three
hours, instead Of one hour as arranged
for plates of the international chart of
the heavens; and il suca exposure were
possible for the entire man, it is thought
that 300, 000, 900 stars would record
their existence, instead of 30, 000, 600.
DR.. Griesbach of the Geological Sur
vey of India, who has returned to Ran
COON from a tour of exploration to the
north Of the Bhamo, reports that near
Myitkina, in a district absolutely unin-
habited, he has discovered most remark
able a%lluvial gold deposits, stretching tor
a great distance up the curse of streams
aud no less than fifteen miles in width.
A ton of alluvial deposit produced twenty
five grains of gold. Lead also has been
found in abundance.