around
through which a thin leather thong may be laced. If it is desired
to "line" the inside, this should be done before the holes are
punched or the lacing done.

** Gear for Model Work [225]

When a gear is needed to drive a small pinion and there is none of
the right size at hand, one can be made in the following manner:
Turn up a wood disk to the proper diameter and 1/4 in. thicker
than the pinion, and cut a flat bottom groove 3/16 in. deep in its
face. The edges should be about 1/8 in. or more thick on each
side. Measure the distance between centers of two adjacent teeth
in the pinion and step this off around the periphery in the bottom
of the groove. Drill holes into the wood on each point stepped off
and insert steel pins made of wire, allowing

[Illustration: Steel Pins in Wood]

the end of each to protrude just far enough to act as a tooth. In
this way a good gear for light work can be quickly and cheaply
constructed.
--Contributed by Henry Schaefer, New York City.

** A Home-Made Vise [226]

While making a box I had some dovetailing to do, and as there was
no

[Illustration: Vise on Bench]

vise on the bench I rigged up a substitute. I secured a board 3/4
in. thick, 3 in. wide and 20 in. long and bored a 1/2-in. hole
through it, 1 in. from each end. The board was then attached to
the bench with two screws passing through washers and the two
holes in the . board into the bench top. The screws should be of a
length suitable to take in the piece to be worked. --Contributed
by A. M. Rice, Syracuse, New York.

** Cardboard Spiral Turned by Heat [226]

A novel attraction for a window display can be made from a piece
of stiff cardboard cut in a spiral as shown in Fig. 1. The
cardboard should be about 7 or 8 in. in diameter. Tie a piece of
string to the center point of the spiral

[Illustration: Spiral Cut from Cardboard]

and fasten it so as to hang over a gas jet, Fig. 2. A small swivel
must be put in the string at the top or near the cardboard, if it
is desired to have the spiral run for any length of time. The
cardboard will spin around rapidly and present quite an
attraction.
--Contributed by Harry Szerlip, Brooklyn, N. Y.

** A Workbench for the Amateur [226]

The accompanying detail drawing shows a design of a portable
workbench suitable for the amateur woodworker. This bench can be
made easily by anyone who has a few sharp tools and a little spare
time. If the stock is p