tied, Fig. 3, to form a handle, Fig. 4.
--Contributed by James M. Kane, Doylestown, Pa.

** Equilibrator for Model Aeroplanes [11]

On one of my model aeroplanes I placed an equilibrator to keep it
balanced. The device was attached to a crosspiece fastened just
below the propeller between the main frame uprights. A stick was
made to swing on a bolt in the center of the crosspiece to which
was attached a weight at the lower end and two lines connecting
the ends of the planes at the upper end. These are shown in Fig.
1. When the aeroplane tips, as

[Illustration: Warping the Aeroplane Wings]

shown in Fig. 2, the weight draws the lines to warp the plane so
it will right itself automatically.
--Contributed by Louis J. Day, Floral Park, N. Y.

** Repairing Christmas-Tree Decorations [11]

Small glass ornaments for Christmas tree decorations are very
easily broken on the line shown in the sketch. These can be easily
repaired by inserting in the neck a piece of match, toothpick or
splinter of wood and tying the hanging string to it.

[Illustration: Repaired Decoration]

** Homemade Scroll Saw [11]

A scroll saw, if once used, becomes indispensable in any home
carpenter chest, yet it is safe to say that not one in ten
contains it. A scroll saw is much more useful than a keyhole saw
for sawing small and irregular holes, and many fancy knick-knacks,
such as brackets, bookracks and shelves can be made with one.

A simple yet serviceable scroll saw frame can be made from a piece
of cold-rolled steel rod, 3/32 or 1/4 in. in diameter, two 1/8-in.
machine screws, four washers and four square nuts. The rod should
be 36 or 38 in. long, bent as shown in Fig. 1. Place one washer on
each screw and put the screws through the eyelets, AA, then place
other washers on and fasten in place by screwing one nut on each
screw, clamping the washers against the frame as tightly as
possible. The saw, which can be purchased at a local hardware
store, is fastened between the clamping nut and another nut as
shown in Fig. 2.

[Illustration: Frame Made of a Rod]

If two wing nuts having the same number and size of threads are
available, use them in place of the outside nuts. They are easier
to turn when inserting a saw blade in a hole or when removing
broken blades.
--Contributed by W. A. Scranton, Detroit, Michigan.

** How to Make a Watch Fob [12]

The fixtures for the watch fob shown--half size--may be made of
eith