t with a little practice it may
be accomplished. This exercise is one of many practiced by the
boys of a boys' home for an annual display given by them. A dozen
of the boys will mount chairs at the same time and keep them in
balance at the word of a commanding officer.

** How to Make a Merry-Go-Round Swing [131]

A 6 by 6-in. piece of wood 12 ft. long is used for the center
pole. Bore a 3/4-in. hole in each end to a depth of 6 in. Place a
3/4-in. bolt in each hole, the bolt being long enough to protrude
2 in. beyond the end of the wood. Short pieces of wood are nailed
on the center pole about 2 ft. from the end that is to be used for
the bottom. This should form a hub on which to place the inner
ends of the extending spokes that hold the platform. The spokes
are made from twelve pieces of 2 by 4-in. material 12 ft. long.

Usually a wheel can be found in a scrap pile suitable to place on
the pin that is in the top end of the center pole. The wheel
should be open

[Illustration: Side and Top View]

or have spokes. This wheel is used to attach wires for guying. The
bottom pin in the center pole is placed in a hole that is bored
into a block of wood about 12-in. square and 3 or 4 in. thick. A
piece of sheet metal should be drilled and placed on the pin
between the block and end of the pole to make a smooth bearing.
The center pole is now placed in position and guyed with six wires
that are about 35 ft. long. Stakes are driven into the ground and
the wires fastened to them and to the wheel at the top end of the
pole. Care should be taken when attaching the wires to get the
center pole to stand perpendicular. Twelve hooks should be placed
at equal distances around the center pole about 1 ft. from the top
end. Wires are fastened to these hooks and to the twelve 2 by
4-in. pieces used for the spokes. The wires should be tied around
each spoke about 2 ft. from the ends. Space the spokes with equal
divisions and cover the outer 2 ft. of the ends with boards, as
shown in the plan sketch on the right hand end of the drawing. The
boards may be nailed or bolted. If bolted and the wires made in a
loop at the hooks, the swing can easily be taken apart and changed
from one place to another.
--Contributed by A. O. Graham, Fort Worth, Tex.

** Home-Made Arc Lamp [132]

The frame of the lamp is made from bar metal 3/4 in. wide and 1/8
in. thick, bent and welded to make a continuous loop in the shape
as shown at G in the