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Many
of the experiments on this site call for you to use some type of flame
as a source of heat. At the beginning of every
experiment on this site which requires an open flame, you will see this
warning or something similar:
CAUTION!
Always be careful to follow all safety precautions when using fire, and
use with adult supervision only! Keep your alcohol lamp or
candle
in an aluminum pie pan, and keep the flame at least three feet away
from anything that can burn, unless otherwise instructed.
You
should always
heed this warning. You only need a small flame
to
do the experiments, and if you follow all safety
precautions and work with fire only when an adult is around and can
supervise, you should have no problems. But make no mistake
about
it. Fire can burn you seriously, and if it gets out of
control,
it can destroy your home, or even kill. Always be extremely
careful when working with fire!
CAUTION!
About 1 cm (½ in) of water should always be placed in the pie
pan
as explained in each experiment below. The water was omitted
from
the photographs below only so you could better see the
construction details.
CAUTION!
Always be careful to follow all safety precautions when using fire, and
use with adult supervision only! Keep your alcohol lamp in an
aluminum pie pan, and keep the flame at least three feet away from
anything that can burn, unless otherwise instructed.
An alcohol lamp, if
properly constructed, will provide one
of the safest sources of flame for the experiments on this site.
Materials Needed:
Small glass jar such as a baby food jar with a tight fitting metal lid;
piece of cotton cloth or rope; large nail; isopropyl rubbing
alcohol
from the pharmacy (about 90% is best);
disposable aluminum pie pan; water.
When selecting a jar, you
should decide what kind of stand you want to use with it and pick a
size that will fit underneath the stand. (See below.)
Procedure:
Using the nail, punch a hole in the underside of the metal
lid.
Cut a piece of the cotton cloth (a handkerchief or cloth from a cotton
t-shirt works well) about 7 cm (3 in) square and roll it into a
tight
roll. Or, cut a piece of thin cotton rope about 7 cm (3 in) long.
Push
the rope or rolled cloth up through the bottom of the lid so that about
1 cm (1/4 in) sticks out above the top of the lid. This is
the
wick. Next, fill the jar about ½ full of alcohol and screw
the
lid down onto the jar tightly. Pour about 1 cm (½ in) of
water
into the bottom of the pan, and place the jar and lid in the middle of
the pie pan. Allow the alcohol to soak up into the rope or
cloth.
The
aluminum pie pan serves as a safety pan. If your alcohol lamp
should
tip over or you should drop a lighted match, the water will
put out flame. You
should always make sure that you use a pan with water, and
that
the alcohol lamp is far away from anything that could catch
fire.
Carefully place a lighted match to the rope or cloth wick.
What To Look For:
The alcohol lamp should light and burn with a pale blue flame.
Going Further:
Alcohol is drawn up into the cloth wick by a process called "capillary
action." (You can learn more about capillary action
on the Liquids
- Part 2 page on this site.) As
the
alcohol burns, more alcohol is drawn up to replace that which has
burned. If you need a smaller flame for an experiment,
shorten
the wick. If you need a larger flame, lengthen the
wick.
Obviously, you should not touch the wick while it is hot!

CAUTION!
Always use sharp objects such as knives or scissors with adult
supervision only! Hold any sharp point away from your body,
particularly your eyes.
CAUTION!
Always be careful to
follow all safety precautions when using fire, and use with adult
supervision only! Keep your candle in an aluminum pie pan,
and
keep the flame at least three feet away from anything that can burn,
unless otherwise instructed.
The following experiment
will show you how to safely use a candle in
your experiments.
Materials Needed:
Candle; aluminum pie pan; water; sharp knife; matches; modeling clay.
Procedure:
Cut your candle down to less than the radius of the bottom of the pie
pan - about 7 cm (3 in) will work well for a
typical pie
pan. (The radius is 1/2 of the width of a circle.) Get an
adult to help
you do this with a sharp knife, and be careful! Next, roll a
small piece of modeling clay i
nto a small "snake" and wrap it around
the bottom of the candle. Place the candle in the center of
the
pie pan and press the clay onto the pan to so that it holds the candle
securely. Make sure that the candle is straight and steady in
the
pan. Place about 1 cm (½ in) of water in the bottom of the
pan. The candle is now ready to use.
CAUTION!
Always use sharp objects such as knives or scissors with adult
supervision only! Hold any sharp point away from your body,
particularly your eyes.
CAUTION!
Always be careful to
follow all safety precautions when using fire, and use with adult
supervision only! Keep your alcohol lamp or candle in an
aluminum
pie pan, and keep the flame at least three feet away from anything that
can burn, unless otherwise instructed.
This experiment will
help you construct a small stand to use with your alcohol lamp or
candle for heating.
Materials
Needed: Home canning jar ring; three wooden clothespins
(Don't use
plastic!); a small piece of wire screen or mesh (metal only, available
from the hardware store); alcohol lamp or candle with safety pan;
matches.
Procedure:
Clip the three clothespins to the underside
of the jar ring as shown. Have an adult to help you to cut
about
a 9 cm (3 ½ in) square piece of wire mesh or screen. Place
the
screen on top of the tripod. Your stand is ready to use with
your
alcohol lamp or candle stand. Always use the pie pan and
water
with either one.
IMPORTANT!
This stand will only
work with an alcohol lamp or candle that is shorter than the
clothespins. If you plan on using an alcohol lamp with this
stand, you should select a jar that is small enough to fit under the
stand with about an inch or so to spare. If you are using a
candle, you will need to cut it down to size. Get an adult to
help you do this!
What To Look For:
The stand should be steady and located in the center of the
pan.

CAUTION!
Always use sharp objects such as knives or scissors with adult
supervision only! Hold any sharp point away from your body,
particularly your eyes.
CAUTION!
Always be careful to
follow all safety precautions when using fire, and use with adult
supervision only! Keep your alcohol lamp or candle in an
aluminum
pie pan, and keep the flame at least three feet away from anything that
can burn, unless otherwise instructed.
The small tripod
described in the last experiment may be used for most experiments, but
with a little more wire mesh, you can make a stand which is much
steadier and which will support more weight.
Materials Needed:
Home canning jar ring; wire screen or mesh (metal only); alcohol lamp
or candle with safety pan; matches.
Procedure:
Have an adult help you to cut a rectangular piece of wire
mesh about 9
cm (3 ½ in) by 22 cm (8 ½ in). IMPORTANT! If your
alcohol
lamp is a bit larger, you can cut the width of the wire so that the
lamp fits underneath with about 3 cm (1 in) to spare. If you are using
a candle, you will need to get an adult to cut the candle so that it
will fit underneath with about 3 cm (1 in) to spare.
When
the wire mesh is rolled up on the long side, it should fit snugly
inside the canning ring as shown. Bend the wire ends around
each
other to hold the wire in place so that it fits snugly under the ring.
Also, be careful to bend the wire ends under so that they won't scratch
you later.
Cut another piece about 9 cm (3 ½ in) square.
Place
the mesh cylinder and jar ring over your candle or alcohol lamp and
light. Then place the square piece on top. Your improved
stand is
now ready to use.
What To Look For:
Like the tripod, this stand
should be steady and located in the center of the pie
pan.
However, this one is a little more secure than the tripod.
Now that you have learned a bit
about fire safety, check out some of the great experiments on this site!