end forth flames and ashes with lava
streaming down its sides in real volcanic action can be made by
any boy without any more danger than firing an ordinary
fire-cracker. A mound of sand or earth is built up about 1 ft.
high in the shape of a volcano. Roll up a piece of heavy paper,
making a tube 5 in. long and 1-1/2 in. in diameter. This tube of
paper is placed in the top of the mound by first setting it upon a
flat sheet of paper and building up the sand or

[Illustration: Volcano in Action]

earth about the sides until it is all covered excepting the top
opening. This is to keep all dampness away from the mixture to be
placed within.

A fuse from a fire-cracker, or one made by winding some powder in
tissue paper, is placed in the paper tube of the volcano with one
end extending over the edge. Get some potash from a drug store and
be sure to state the purpose for which it is wanted, as there are
numerous kinds of potash that will not be suitable. An equal
amount of sugar is mixed with the potash and placed in the paper
tube. On top of this put a layer of pure potash and on this pour
some gun powder. This completes the volcano and it only remains
for the fuse to be lighted and action will begin with an explosion
which sends fire, smoke and sparks upward. Flames will follow and
the lava pours down the sides of the mound.

** Wire Loop Connections for Battery Binding-Posts [449]

The trouble with battery binding post connections can be avoided
by winding the bare end of the connecting wire around the
binding-post screw and then back around its extending length as
shown in the sketch. Always screw down permanent connections with
pliers.

[Illustration: Loop]

** Melting Metal in the Flame of a Match [449]

The flame of an ordinary match has a much higher temperature than
is generally known and will melt cast-iron or steel filings. Try
it by striking a match and sprinkle the filings through the flame.
Sputtering sparks like gunpowder will be the result of the melting
metal.

** Russian Squirrels [449]

The squirrel slaughter of Russia amounts to 25,000,000 per year.

** Landscape Drawing Made Easy [449]

With this device anyone, no matter how little his artistic ability
may be, can draw accurately and quickly any little bit of scenery
or other subject and get everything in the true perspective and in
the correct proportion.

[Illustration: Drawing with the Aid of Reflecting Glasses]

No