Any well-made solid table will have a flat top when new. But how
do you keep that top from warping with seasonal changes in
humidity? Contributing editor Christian Becksvoort explains why
the properties of wood make it liable to warp and how your
choice of lumber has a lot to do with whether a table will cup
or twist. Then, Becksvoort shares three ways to keep a top
stable and flat for years to come—using aprons, cleats, or
breadboard ends.  From Fine Woodworking #183