Arkansas intelligencer., 1858-06-18
From DR.. Dre7ccr's Gai,ie 10 Science.
Science Answering Simple Questions.

Why is rain water soft Because il is not
impregnated with earth and minerals.
Why is it more easy to wash with soft
water than with hard ! Because soft waite.
un'tes freely with soap, and dissolves it in.
stead of deeomposing it, as hard water docs
Why do wood ashes make hard water
soft!
lst. Because she cashenie acid OF wood
ashes combines with the sulphate of lime in
the hard water, and converts it into chalk;
2dly, wood ashes convert some of the soluble
salts of water into insoluble, and throw them
down as sediment, by wqich the water re-
mains more pure.
Why has rain water such an unpleasant
smell when it is collected in q rain-tub or
tank Because it is impregnated with de-
composed organic matter washed from the
roofs, trees, or the casks in which it is collect
ed,
Why does water melt salt Because We
ry minute particles of water nsinuate them
selves into the pores Of the salt by capillary
attraction, and force the crystals apart from
each other.
How does blowing hot food make them
oools 1t causes the air which has been heat
ed by food to change more rapidly, and give
place to fresh cold air.
Why do ladies fan themselves in hot wea
thcr? That fresh particles of air may be
brought in contract with their face by the ac-
ton Of the fan; and as every fresh particle of
air absorbs some heat from the skin, this con-
slant change makes thep cool.
Does a fan cool the air No, it makes
the air hotter, by imparting to it the heat of
our face; but it cools our face by transferring
its heat to the air.
Why is there always a strong draught
through the kcyhole of a door Because tho
air IN the room we occupy is warmer than
the air in the hall, therefore the air from the
hall rushes through the keyhole into the room
and causes draught.
Why Is there always strong draught un-
der the door and through the creviees or,
each side? Because the cold air rushes from
the hall to supply the void in the room caus-
ed by the escape of warm air up the chin
ney, &c.
Why is there always a draught through
the window crevices /! Because the external
air. being colder than the air of the goom We
occupy, rushes through the window creyices
to supply the deficiency caused by the escape
&C . ,hn H. Il,
If you open the lower sash of a window
there is moro 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 cause a great
draught inward; but if the upper sash be
open, the heated air of the room will rush
out, and of course there will be less draught
inward.
BY which means is a room better ventia
ted-by opening the upper or lower sash
a room is better ventilated by opening the
upper sash; because the hot vtiated air, which
always ascenls to the ceiling, can escape more
easily.
BY which means is a hot room moro quick
ly cooled-by opening the upper or lower
sash! A hot room is cooled more quickly
by the lower sash, because the cold air can
enter more freely at the lower part of the
room than at the upper.
Why does the wind dry damp lnsn?-
Because dry wind, like dry sponge, imbibes
the particles of vapor from the surface of the
linen as fast as they are formed.
Which is the hottest place in church or
chapels The gallery.
Whip is the gallery of all public places
hotter than the lower parts of the buildings !.
Because the heated air of the building as
cends, and all the cold air which can enter
through the doors and windows keeps to the
floor till it has become heated.
Why do plants often grow out OF walls and
towers! Either because the wind blew the
seed there with the dust, or else because
some bird, flying over, dropped seed there,
which it had formerly eaten.