Lynchburg daily Virginian. [volume] (Lynchburg [Va.]) 1852-1861, 1852-11-23
NUMBER 81.
0bc DaiIp bireinian.
From DR.. Brewers Guide to Science
Science Answering simple Questions.

Why is rain water soft because it is not
impregnated with earth and minerals
Why Is it more easy to wash with soft water
than with hardi-Because soft water unites
freely with soap, and dissolves it instead Of de.
composing it, as hard water does
Why do wood ashes make hard water soft
1st. Because the carbonic acid of wood ashes
combines with the sulphatc oflme In the hard
water, and converts it into chalk; 2dly: Wood
ashes converts some OF the soluble salts OF wa
ter into insouble and throw them down as
sediment, by which the water remains more
pure
Why has rain water such unpleasant
smell when it is collected in a rain water tub
or tank7 Because it is impregnated with de-
composed organic matters washed from roofs,
trees, or the casks in which it is collected.
Why does water melt salt9 Because very
minute particles Of water insnuae themselves
into the pores of the salt. by capillary attrac-
ton, and force the crystals apart from each
other.
How docs blowing hot foods make them
cooll 1t causes the air which has been heated
by the food to change more rapidly, and give
place to fresh cool air.
Why do ladies' fan themselves in hot wealth
err That fresh particles of air may be brought
in contact with their face by the action Of the
fan; and as every fresh particle of air absorbs
ONE heat from the skin, t0is constant change
makes them cool
Does a fan cool the ar' No, it makes tho
air hotter by imperting to it the heat of our
face, but cools our face by transferring its heat
to the air.
Why is there always a strong draught
through the keyhole of doorl Because the
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 q draught.
Why is there always a strong draught under
the door and through the crevices on each sidef
Because cold air rushes from tho hall, to sup
ply the void in the room caused by the escape
of warm air up the chimney, &c
Why is there always a draught through the
window crevices7-Because the external air,
being colder than the air of the room we occu-
py rushes through the window crevices TO sup
ply the deficiency caused by the escape OF the
warm air up the chimney, &c.
Ifyou open the lower sash of window,
there is more draught than If you open tho
upper sash Explain the reason of this? 1.-THE
lower sash be open, cold external air will rush
freely into the room and cause great draught
inward; but if the upper sash be open, the
heated air of tho room will rush out, and of
course there will he less draught inward.
BY which means is room better ventllat-
ed-by opening the upper or lower sash' A
A room is better ventilated by opening the
upper sash; because the hot ,itated air, which
always ascends towards the ceiling, can escape
more easily.
BY which means is hot room more quick
y cooled-by opening the upper or lower sash'
A hot room is cooled more quickly by open
ing tho lower sash; because the cool air can
enter more freely at the lower part of the
room than at the upper
Why does the wind dry damp lnen2 Be-
cause dry wind, Ike dry sponge imbibes the
particles Of vapor from the surface ofthc linen
as fast as they are formed.
Which is the hottest place in church or
chapell The gallery.
Why is the gallery of all public places hot
ter than the lower parts oil the buildingsi Be-
cause the heated air Of the building ascends;
and all the cool air which can enter through
the doors and windows keeps to the floor till
ii has become heated.
Why do plants often grow out OF walls and
tow ersl--Eithe because the wind blew the
seeds there with the dust; or else because some
bird, flying over, dropped seeds there, which
it had formerly eaten.