11 / 78
' ·
' AQUEOUS·
B:svnAG°E&··'
11
't
traruiparent well water, for
that
of
the
'uwst
tur-··
t
bid stream.
'"· · , ·
·
._.
~·,..--
N. B. The water
· ·or"'-pum~. sittii~
near· · ..
church-yards,
is
always. contaminated
by
the
deep drninage·and oosings :·
it
is
unwholesOme
in ·
the extreme.
RIVER WATER
In
its purest state
may
be regarded as
the
best
:fitted
for human use ; near cities
it
is
always ·
impure, containing suspended, organic matters,
that
require
to be
separa.ted
by
filtration, before ,
it
is
used
as a beverage or for
cookery. .
- ;
FILTEREJJWATER. --
· · · ..
The cheapest
and
moei efficient filter, ·on
a ·
.
small
scale,
may
be
thus
made :-
take
a
wry·
large common
ga.rdefl:
!J.ow~
over the hole.
in ;
the
bottom
place
a
piece
o(
·sponge; · on
which
,
J>Ut
a
layer
of small
atoaes, .
fill .
the
pot
.two--'
thirds
of
the
by
up
with'
a
mixture
of one
~ -~
coanely
powdered
fruhly
6tcrnea
charcoal,
and :._
two
parts
well
wa8hed,
clear,
sharp
sand; on
the top
lay
a piece
ol
thick fia.nDel,
which
is
to
be
pressed down
in
the centre, but tied
se- ·
curely over the
rim. -· ··
The
:flannel will
form
a
·
basin.
into which the water
to
be
filtered
is
to
be
~ured,
when it
will
be
iO~
to
flow C?ui. _
rapidly, and
perfectly
clear ;
the flannel, which
separates the
grosser .
impurities, should
be
fre–
quentl
y
removed and
washed,
and the sand and ,
cliarcoa.l
changed two or
three
times a
year.
The ;
action of
this
filter
is
superior to many or
thcee··