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1
1036
Enquire within upon everything
·
Robert Kemp Philp
630
1774.
Charcoal
as
a
Disinfectant.
The
great
efficacy
of
wood
and
animal
charcoal
in
absorbing
effluvia,
and
the
greater
number
of
gases
and
vapours,
has
long
been
known.
Charcoal
powder
has
also,
during
many
centuries,
been
advantageously
employed
as
a
filter
for
putrid
water,
the
object
in
view
being
to
deprive
the
water
of
numerous
organic
impurities
diffused
through
it,
which
exert
injurious
effects
on
the
animal
economy.
Charcoal
not
only
absorbs
effluvia
and
gaseous
bodies,
but
especially,
when
in
contact
with
atmospheric
air,
oxidize,
and
destroys
many
of
the
easily
alterable
ones,
by
resolving
them
into
the
simplest
combinations
they
are
capable
of
forming,
which
are
chiefly
water
and
carbonic
acid.
It
is
on
this
oxidizing
property
of
charcoal,
as
well
as
on
its
absorbent
power,
that
its
efficacy
as
a
deodorizing
and
disinfecting
agent
chiefly
depends.
1775.
Charcoal
as
an
Antiseptic.
Charcoal
is
an
antiseptic,
that
is
to
say,
a
substance
which
arrests
the
decay
and
decomposition
of
animal
substances.
Meat,
poultry,
game
or
fish,
&c.,
may
be
preserved
for
a
longer
period
in
hot
weather
by
sprinkling
it
with
powdered
charcoal,
which
should
be
washed
off
in
clean
cold
water
before
the
article
is
cooked.
1776.
Charcoal
Respirators.
It
has
been
proposed
to
employ
charcoal
ventilators,
consisting
of
a
thin
layer
of
charcoal
enclosed
between
two
thin
sheets
of
wire
gauze,
to
purify
the
foul
air
which
is
apt
to
accumulate
in
water-closets,
in
the
close
wards
of
hospitals,
and
in
the
impure
atmospheres
of
many
of
the
back
courts
and
mews-lanes
of
large
cities,
all
the
impurities
being
absorbed
and
retained
by
the
charcoal,
while
a
current
of
pure
air
alone
is
admitted
into
the
neighbouring
apartments.
In
this
way
pure
air
may
be
obtained
from
exceedingly
impure
sources.
The
proper
amount
of
air
required
by
houses
in
such
situations
might
be
admitted
through
sheets
of
wire
gauze
or
coarse
canvas,
containing
a
thin
layer
of
coarse
charcoal
powder.
Marker
Marker
Fine marker
White-out
Fine white-out
Circle
Paint
Unmarker
Hand
Scalpel
Dice
Sieve
Purify
Undo
Redo
Start over
