For the rope, choose something with a little stretch—I use^1 ⁄ 8 -in.
nylon. Tie a loop in the rope just long enough so that it can barely be
snapped over the blocks. This will hold the frame together while final
adjustments are made in the glue joints. When the joints are right,
twist a dowel onto the rope and turn it to produce whatever pressure
is desired. The leverage is tremendous so don’t overdo it. It’s a good
idea to put a weight on the frame while you’re applying pressure.
If one corner comes up a little, the whole assembly may twist
and fly apart.
When the pressure is sufficient, tape or tie the dowel to the rope.
Always maintain a tight grip on the dowel—it can unwind with
surprising force.
—H. N. CAPEN,Granada Hills, Calif.
CLAMPING