Then the tenons may be laid out on the ends parallel to a straight-edge laid along the concave side.

The chair bottom may be made of solid wood, either flat or modeled into a "saddle seat;" it may be covered with cane or rush, or it may be upholstered.
[Illustration: Fig.299.Bending Boards into Shape after Boiling Them.] To upholster a chair seat, a frame should first be made of the shape shown in Fig.

298, C.The strips are about 2" wide and 1/2" thick with their ends half-lapped.

The seat rails are rabbeted 1/2" deep and 1/2" wide to receive this frame, which should be 1/8" smaller all around than the place to receive it.

The returns at the corners fit around the legs at 1/8" distance from them.