Year: 1859

Why is rain water soft Because it is not
impregnated with earth and minerals.


Why is itRore easy to wash with soft water
than with I'D Because soft water unites
freely with soap and dissolves 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 sulphate of fmein the
hard water, and converts it into chalk I'd,
wood ashes convert some of the soluble salts
of water into insoluble and throw them down
as a 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 or
ganic matters washed from the roofs, trees, oil
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
| ton, and force the crystals from each other


How does blowing hot foods make them cooli
| It causes the air which has been heated BY
! food to change more rapidly, and give place
| to fresh cold. air. ttF sa


Why do ladies fan themselves in hot wealth
| er? That fresh particles ofair may be brought
in contract 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 10f 1- 1Es . sat5E


Does fan cool the air? No, it makes the
air hotter, by imparting to it the heat of oul
face but it cools our face by transferring its
heat to- the air. C z52


Why is there always aestrong draught under
the door and through the ereyiees. on eachlside:
Because cold air rusher from the hall to sup
ply the voidlin the room caused by the escape
of certain air up the chimney, &c.


Why is there always a strong drauebt
| fhroroh tho lav vboln of door Raoa11ce the
| air in the room we occupy is warmer than the
air in the hall; therefore the air from the hal
rushes through the keyhole into the room, and
causes a draught. 1ite


Why is there always draught through the
window crevices? Because the external air
being colder than the air of tie room we occu-
py, rushes through the window creSces to sup
ply the deficiency caused by. the escape of the
warm air up the chimney eFe.
/ If you open the lower sash of q 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 cause great draught
inward but if the upper sash be open, the
heated air of the room rushes out, and, of
course; there will be less draught inward.


BY which means is room better Ventilated
by opening the upper or under sash 2? Be
cause the hot, vitiated air, which always as
cends towards the ceiling, can escape more
easily.


By which means is hot room more quickly
cooled-by opening the upper or lawer sash !
A hot room is cooled more quickly by the
lower sash, because the cool air can enter more
freely at the lower part of the room than at the
upper.


s'1 Why does the wind dry damp linen? Be
cause dry wind, like dry sponge, imbibes the
particles of vapor from the surface of the lin
en- as fast as they are formed.


Which is the hottest place in church or
chapel? The gallery.


Why is the gallery of all public places hot
ter than the lower parts of buildings? Be
cause the heated air of the building ascends,
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.