The Emmett index. [volume] (Emmett, Idaho) 1893-1925, 1901-03-29

az o. 40
8 sssssla1ventiOn'

A metallurgist has calculated the
various values that a bar Of iron may
acquire in being put to different uses.
Made into horseshoes it becomes worth
$12, into table knives $16O, into needles
$3.50. into blades for penknives So, $50, |
into button buckles $500, into watch |
springs $4,000.
TO the average observer Of the flight |
Of birds everything is deceptive. TO
compare the flight Of large bird with
a smaller one is especially so. The cor.
morant Of the sea coast seems to be
slow flyer, yet ne does mile in one
minute and ten seconds. The honey
bee seems to travel like bullet, yet II
takes him two initiates 70 fly one mile.
The humming bird does not fly as fast
as many slow Tapping birds Of ungain-
1 ly bulk The quail appears to get away
more rapidly than does the mallard, but
he does not do it.
Professor Campbell, Of the Lick OBJ
servatory, reports that the star called
XII Geminorum, which has long been
known as a variable, is in reality dou-
Bile, but its two components are so close
that no telescope is able to separate
them, and their existence is proved by
the shifting lines in the spectrum. The
variations in brightness, he thinks, can
only be due to the attraction between
the two stars raising immense tides in
their molten or vapOrous globes, which,
through the effects Of compression or
otherwise, displace the spectral lines.
The dew is condensed out Of the air
in contact with surfaces below GER
tain temperature. At night the surface
of the earth and all things on 1t, and
especially the smooth surfaces Of veg
etabIe productions, are constantly be-
ing cooled by radiation. If the sky is
covered with clouds, the radiation sent
back from the clouds nearly supplies an
[ equivalent for the heat thus parted
WITH but if the sky be clear, no equiv
, alent is supplied, and the surface Of
the earth and things growing on it be-
! come cooler than the atmosphere. II
Y the night also be calm, the small por-
ton of air contiguous to any Of these
: surfaces will become cooled below the
| so-called dew point, and its moisture
= deposited on the surface in the form Of
. dew.
] At the Yale observatory an interest
S ing use has been found for the bicycle
] wheel. BY fitting such a wheel with a
r series of opaque screens placed at reg
o ular intervals and then rotating it, with
e the aid of a small motor, at the rate Of
}, from thirty to fifty turns in minute
e In front of the cameras used to photo
graph meteors, DR.. Elkin has succeed
u ed in measuring the velocity Of the me-
Z, teors' flight. The principle depends
L upon the Interruptions produced by the
screens in the trails of light made upon
I the Photographic plates by the flying
/ meteors. The velocity Of the wheel is
5 known at every instant by means Of a
d chronographic record, and the length OF
q the Interruptions indicates the speed
u of the meteors.
y Among the scientifis toys at the Paris
exposition was an instrument named
- the Horoscope" 1t consisted of g
q wooden paddle about six and a hall
- feet long and three inches broad
whitened with chalk, and turning abou
, its middle at the rate of 1900 turns il
u minute. When in motion the paddl,
- resembled a thin, circular screeI
through which objects could be seen
= At a distance Of nearly four feet be
y hind the whirling paddle and parable
"a to its plane of rotation was fixed
black screen. The apparatus beinl
h. placed in a dark chamber, a brillian
20 Photographic image of some object wa
- projected upon the moving paddle, ant
Immediately the image seemed to stan'
pr forth with all the solidity Of a real oh
is iect The perspective was supplied b.
the reflection Of the image from tn
of black screen behind as well as fror
or the semi-transparent screen formed b
a the rotating paddle.
TILE ANY AND HER PASTOR