The Middlebury register. [volume] (Middlebury, Vt.) 1850-1882, 1858-11-24
Science Answering Simple Guess
tions-

Why is rain water softf Because II Is
not impregnated 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 dis
solves it instead of decomposing it as hard
water does.
Why do wood ashes make hard water
soft? lst Because the carbonic acid of
wool ashes combines with the sulphate of
lime in hard water, and converts it into
chalk. I'd, Wood ashes convert some of
the soluble salts of water into insoluble
and throws them down as sediment, by
which the water remains more pure.
Why has rain water such an unpleasant
smell when it is collected in rain tub or
tank Because it is impregnated with
decomposed organic matter washed from
the roofs, trees, or the casks in which it
is collected.
Why does water melt salt Because
very minute particles Of water insinua.te
themselves into the pores Of the salt by
capillary attraction, and force the crystals
apart.
How does blowing hot food make it
cool Ii causes the air which has been
heated BY food to change more rapidly,
and give place to fresh cold air.
Why do ladies fan themselves in hot
weather 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 some heat from the
skin, this constant change makes them
cool.
Does a fan cool the air7 No, it makes
the air hotter by imparting to it the heat
of our face; but it ceols our face by
transferring its heat to the air.
Why is there always a strong draught
through keyhole? Because the air in
the room we occupy is warmer than the
air in the hall therefore the air in the
hall rushes through the keyhole into the
room and causes a dra'ht.
Why is there always a strong draught
under the door and through the crevice
on each side ? Because the Geld air rushes
from the hall to supply the void in the
room caused by the escape of warm air up
the chimney.
Why is there always drar.ght through
the window crevices? Beca use the ex-
ternal air, being colder than the air of the
room we occupy, rushes through the win
dow crevices to supply the deficiency
caused by the escape Of the warm air up
the chimney.
If you open the 10 wer sash of window
there is more draught than if you open
the upper sash. Explain the reason of
this. If the lower sash be opened, cold
external air will rush freely into the room
and cause grea draught inward but if
the upper sash be opened the heated air
of the room will rush out, and Of course
there will be les draught inward.
By which me ms is a room best venti-
lated-by oper ling the upper or lower
sash A ROOM is better ventilated by
opening the upper sash, because the hot
vitiatsd air always ascends towards the
ceiling, and can there easily escape.
By what means is hot room more
quickly cool sd-by opening the upper OF
lower sash7 A hot room is cooled more
quickly by i.he 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 linen
Because dry wind, like dry sponge, i'm.
bibes the particles of vapor from the sur
face of the linen as fast as they are form
ed.
Which is the hottest place in church
or chapel? The allery.
Why is the gale ry Of all public places
hotter than the lowel, part of the buildings
Beeav Sc the hot air of the buildings as
cends. and all the co Id air which can ente
thru ugh the doors al ,d windows keeps II
thu, floor till it has b, scome heated.
AN EXCITING s, cENE-A Boy TE,