Year: 1859

Why Is ram water soit! because IT 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? 1st, Because the carbonic acid of
wood ashes combines with the sulphate
of lime in the hard water, and converts
it into chalk; I'd, wood ashes also convert
some of the soluble salts of water into in
soluble, and throw them down as sedi-
ment by which the water remains more
pure.


Why has rain water such an unpleas-
ant smell when it is collected in a rain
tub or tank? Because it is impregnated
with decomposed organic matters washed
from the roofs trees or the casks in which
it is collected


Howdoes blowing hot foods make them
cool? 1t 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 fan cool the air? No, it makes
the air hotter, by imparting to it the heat
from our face; but it cools our face by
transferring its heat to the air.


Why is there always strong draft un-
der the door and through the crevices on
each side? Because cold air rushes from
the hall to supply the void in the room
caused by the escape of warm air up the
chimney, &c.


Why is there always strong draft
through the key hole of a doorY Because
the air in the room we occupy is warmer
than the air in the hail. therefore the air
from the hall rushes through the key hole
into the room, and causes draft.


Why is there always a draft through
the window crevices? Because the ex-
ternal air, being colder than the air of
the room we occupy, rushes through the
window crevices to supply the deficiency
caused by the escape of the warm air up
chimney.


If you open the lower sash of a window
there is more draft than if you open the
npner sash Evrlain the reason of this. If
the lower sash be oiicu, tbs cOfc vsssc.>.ai
air will rush freely into the room and cause
a great draft inward; butt the upper sash
be open, the heated air of the room rush
es out, and, of course, there will be less
draft inward


Why is room best ventilated byopen-
ing the upper sash? Because the hot
vitiated air, which always ascends towards
the ceiling, can escape more easily.


BY which means is hot room more
quickly cooled-by opening the upper or
lower sash? A hot room is cooled more
quickly by opening thel lower sash, because
the outer air can enter more freely into
the lower part of the room where it is
colder.


Why does the wind dry damp linen?-
Because dry wind, like a dry sponge, inn
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 gallery.


Why is the gallery of all pnblic places
hotter than the lower parts of the build
ings? Because the heated air of the build
ing ascends, and all the cold air which
can enter through the doors and windows
keeps to the floor till it has become heat
ed-SeintJfc An'eriean,