Washington standard. [volume] (Olympia, Wash. Territory) 1860-1921, 1873-03-22

REASONS FOR FACTS IN SCIENCE.

hhhOVND Kun 1dOlo In SOlhNObs
What is the cause of the sensation
called cold? When we feel cold, heat
is drawn from our bodies.
When substances feel neither hot nor
cold? When they are of the same
temperature of our bodies. -
Is water bad or good conductor?-
Water is an Indifferent conductor, but
it is better conductor than air. ..s
What is the cause of the sensation
called heat? When we feel hot, our
bodies are absorbing heat from external
causes.
Do some substances absorb heat
Yes; those substances which are the
best radiators are also the best absorb
ers of heat.
Why are woolen fabrics bad con-
ductors of heat? Because there is q
considerable amount of air occupying
the spaces of the texture.
What is radiation? The radiation of
heat is motion of the particles, in q
series of rays, diverging from heated
body.
What sources of radiation are there
besides the sun and fire The earth,
and all minor bodies besides, are in
| some degree radiators of heat.
Which are the better conductors of
heat, fluids or solids? Generally speak
ing, solids, especially those of them
that are dense in their substances.
Why do iron articles feel intensely
cold in the winter? Because iron is
one of the best conductors, and draws
off heat from the hand very rapidly.
Why are dense substances the best
conductors of heat? Because the heat
more readily travels from particle to
particle until it pervades the mass.
Why is it said that snow keeps the
earth warm? Because snow is bad
conductor, and prevents the frosty air
from depriving the earth of it's warmth.
Why are furs and woolens and fan
nels worn in winter? Because, being
non-conductors they prevent the warmth
of the body from being taken up by the
cold air.
Is the nir ever hot enough in any part
of the world to destroy life? The hot
winds of the Arabian deserts, which
are called Simoolns, frequently destroy
both man and beast.
How is warmth provided for in ami
mails that have no such coats? They
are furnished wit layer of fat which
lies underneath the skin. Fat consists
chiefly of carbon and is non, conduc-
tor.
What substances are best and worse
radiators? All rough and dark colored
substances and surfaces are the best,
and all smooth bright, and light colored
surfaces are the worst radiators of heat.
Why, when we place our hands in
water, which may be of the same tenn
perature as the air, does the water feel
some degrees colder? Because water,
being better conductor than air, takes
u2 the warmth of the hand more rap
idly.
Why does a bright metal teapot
produce better tea than brown OF
black earthenware one? Because bright
metal radiates little heat, therefore the
water is kept hot much longer, and the
strength of the tea is extracted by the
heat.
How is the greater warmth of ami
mails provided for in the winter? 1t is
observed as winter approaches, there
comes q short woolly or downy growth,
which adding to the non-conducting
property of their coats confines their
animal warmth.
Why would not the dark earthenware
jug keep the water hot as long as the
bright metal one? Because the par
ticles of earthenware being rough, and
of dark color, they radiate heat freely,
and the water would thereby be quickly
cooled.
But if the earthenware teapot were
set by the fire, why would it then make
the best tea? Because the dark earthen-
ware teapot is good absorber of heat,
and the heat it would absorb from the
fire would more than counterbalance
the loss by radiation. ...
Why, when we take our hands out of
water, do they feel warmer? Because
the air does not abstract the heat of the
hand so rapidly as the water did, and
the change in the degree of rapidity
with which the heat is abstracted pro-
duces sensation of increased warmth.
~ If any WebfOot has deluded into
the belief that the Oregon Legislature
possesses a monopoly of Legislative
pleasantries, let him read the following
extract from the Kansas City Council
proceedings: You are not afraid of
me, you little, contemptible-? Why,
could tread upon you, and Crush
you, sirY' Harner looked down nerv-
ously toward Porter's pedal extremities,
when, after securing safe distance, he
replied, like David unto Goliah, =" 1 fear
you not, you great overgrown skunk?
-Oregonian. e.i t.,''
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