dgadams wrote:
Also, it's been my experience that trying to reinforce
an old chair by putting in some nails or screws doesn't
work very well. Anybody have any suggestions?


I've had good success using polyurethane glue in similar situations.
The expansion of the glue helps fill any gaps so the joint stays tight.
Wait until the glue dries and carefully chisel away any excess that
foamed out of the joint.

DonkeyHody
"Even an old blind hog finds an acorn every now and then."