The Emmett index. [volume] (Emmett, Idaho) 1893-1925, 1901-09-12
|E5eSCienCe'
y : s11ventiOn


Among recent novelties IN electric
lighting Is an incandescent lamp hay
ing two independent filaments, one Civ
ing sixteen and the other only one can
dle-power. The low-power light is in
tended Cor burning in sick-room, or
wherever a faint illumination Is de-
sired. The current is changed from one
filament to the other by turning the
lamp in n screw socket.
The eminent French chemist, NJ. Ar
mand Gautier. has reported a discovery
to the Paris Academy of Sciences
which may prove Of great hygienic val
Tie. He has found that finely powdered
volcanic stones treated by boiling in
water ut temperature of $50 to 300
degrees Celsius yield liquid identical
in composition with the ordinary sui
phur water of mineral springs. except
that 1t is stronger than the latter.
In this erl of world empires" inter
est in the suns empire is hardly sur
prising. An English inquirer seeks to
learn its size, and points out that three
well-known comets of short period
have orbits extending beyond that Of
Neptune, while one comet of long
period Donatis-has n period of near
ly two thousand years. If this last
named comet really moves about the
sun, 1t is calculated that the diameter
of the solar system must be nearly co.
0OO,OO0,OOO miles.
Pass a ray of sunlight through drop
of water. and the colored rays are split
up and thrown in different directions
The sunlight shining through many
drops of falling rain after shower is
all split into colors, and the result is the
gorgeous rainbow. The scattered spray
of sea wave, of a waterfall or a foun-
tain, makes little rainbows, caused in
the same way. Each kind of light has
its own special uses. The red rays of
light make the leaves of the tree grow,
and hasten all roofing and decay. More
over, if you cut off the red rays, plants
will grow with golden brown leaves in
stead of green.
The British Meteorological Council has
just published charts showing the re-
markable weather conditions which
prevailed over the North Atlantic
Ocean and adjoining lands in the win
ter of 1S9S-99. At sea the weather was
extremely boisterous for period Of six
weeks, while a great difference of tenn
perature prevailed between the two
sides of the ocean. On Feb. 10 the Their
mometer lat Fort Logan, Mont. was
81 degrees below zero, while on the
same day at I.iege. Belgium, it was
800 above zero, difference of 1917
degrees, and over extensive regions on
the two sides of the Atlantic the differ
ence in temperature amounted to 100
degrees.
An ingenious method of making pho
tographic copies of plates and engrav-
ings in books which cannot be removed
from the libraries, and where the use
of the camera is prohibited. has been
devised by Mr. f. Sarvls-Smith, an Eng
lishman. Fie coats a cardboard with a
phOsphorescent substance, exposes 1t to
sunlight or electric-arc light, and then
places 1t at the back of the engraving,
while dry Photographic plate is placed
on the face Of the engraving. The book
is closed, and after a period varying
from IS to 90 minutes, depending large
ly on the thickness of the paper, sat
lsfactory negative is produced. The
book is enclosed in a black cloth during
the maniDulntiOn.