Nashville patriot. [volume] (Nashville, Tenn.) 1858-1860, 1858-08-02
Science Answering Simple Question.

Why is rain water soft ? Because it is not
| imprcgnatcd with earth and minerals.
Why Is it more easy to wash with soft
water than with hard Because soft water
unites freely with soap. and dissolves it in
| stead of dccomposing it as hard water does.
| Why do wood ashes make hard water soft
| lst. Because the carbonic acid of wood ashes
combines with the sulphate Of lime in the
! hard water. and converts it into chalk; IDLY,
Wood ashes converts some of the soluble salts
of water into insoluble, and throws them
down a sediment, by which the water re-
mains more pure.
Why has rain water such a unpleasant smell
when it is collected in rain-tub or tank p
Because it is impregnated with decOmposed
organic matters wash from the roofs, trees,
or the casks in which it is collected.
Why does water melt salt? Because very
minute particles of water insinuate themselves
into the pores of the salt by capillary attrac-
tion and force the crystals apart from each
other
How does blowing hot food make it cool ?
-Itcau Ses the air which has been heated by the
food to change more rapidly, and give place
to fresh cold air.
Why do ladies fan themselves in hot wealth
err? That fresh particles of air may be
brought in contac with their face by the ac-
ton of the fan; and as every fresh particle
of air absorhs some heat from the skin, this
Con>ldut tucll CDpl
Does fan cool the air? No. it makes the
air hotter, by mparting to it the heat of our
face: but it cools our face by transferring its
heat to the air.
Why is there always strong draught
through they key hole of IA door? Because
the air in the room we occupy is warmer than
the air in the ball therefore the air from the
hall rushes through the KEEP hole into the
room. and causes "A draught.
bxr 10 al n afr nht
der the door and through the crevice on each
side? Because the cold air rushes from the
hall to supply the void in the room caused by
the escape of the warm air up the chimney,
&c.
Why is there always draught through the
window crevices? Because the external air
being colder than the air of the room we occu-
ply ,rushes through the window crevces 10 sap
ply the deficiency caused by the escape OF the
warm air up the chimney, &c.
If you open the lower sash of window
there is more draught than if you open the
upper SASH Explain the reason of this. If
the lower sash be- open. cold external air Will
rush freely into the room and great draught
inward; but if the upper sash be opened, the
heated air of the room will rush out aud, of
course. there will be less draught inward.
BY which means is a room better ventilated
by opening the upper sash; because the
hot, vitiated air, which always ascendS toward
the ceiling, can escape more easily.
BY which means is a hot room more quickly
cooled-by opening the upper or lower sash.
A hot room is cooled more quickly by opening
because the air can enter more freely at the
lower part of the room Than Mt tn upper.
Why does the wind dry damp linen, Be-
cause dry wind, like dry sponge, imbibes
the particles of vapor from the surface Of the
Inca as fast as they are formed.
Why il the GALL, ~ az all public nlncps hot
ter than the lower parts OF the building! Be-
cause the air OF the bnilding ascends. aud all
the cold air which can enter through the
doors and windows, keeps to the floor till il
has become heated.-Dr. Breircr's GUIDE 20
ScieIiee.