ough the paper and into the extreme end of the spindle, as at
A, Fig. 2. This is to form the fuse hole.

Having finished this, place stick and all in a pail of sand, being
careful not to get the sand in it, and letting the opening at the
top extend a little above the surface of the sand. Then fill the
paper cylinder with melted lead and let cool. Pull out the nail
and stick, scrape off the paper and the cannon is ready for
mounting, as in Fig. 3.
--Contributed by Chas. S. Chapman, Lanesboro, Minn.

** Homemade Electric Bed Warmer [338]

The heat developed by a carbon-filament lamp is sufficiently high
to allow its use as a heating element of, for instance, a bed
warmer. There are a number of other small heaters which can be
easily made and for which lamps form very suitable heating
elements, but the bed warmer is probably the best example. All
that is required is a tin covering, which can be made of an old
can, about 3-1/2 in. in diameter. The top is cut out and the edge
filed smooth. The lamp-socket end of the flexible cord is inserted
in the can and the shade holder gripped over the opening. A small
lamp of about 5 cp. will do the heating.

A flannel bag, large enough to slip over the tin can and provided
with a neck that can be drawn together by means of a cord, gives
the heater a more finished appearance, as well as making it more
pleasant to the touch.

** Making a Fire with the Aid of Ice [338]

Take a piece of very clear ice and melt it down into the hollow of
your hands so as to form a large lens. The illustration shows how
this is done. With the lens-shaped ice used in the same manner as
a reading glass to

[Illustration: Forming the Ice Lens]

direct the sun's rays on paper or shavings you can start a fire.
--Contributed by Arthur E. Joerin.

** How to Make a Crossbow and Arrow Sling [339]

In making of this crossbow it is best to use maple for the stock,
but if this wood cannot be procured, good straight-grained pine
will do. The

[Illustration: Details of the Bow-Gun and Arrow Sling]

material must be 1-1/2 in. thick, 6 in. wide and a trifle over 3
ft. long. The bow is made from straight-grained oak, ash, or
hickory, 5/8 in. thick, 1 in. wide and 3 ft. long. A piece of oak,
3/8 in. thick, 1-1/2 in. wide and 6 ft. long, will be sufficient
to make the trigger, spring and arrows. A piece of tin, some nails
and a good cord will complete the materials necessary to make the
crossbow.