51, is very neat and strong, and the joint is entirely concealed when done, but is very difficult to make.
_The Bottoms of Boxes._ The plain or full bottom, Fig.

284, A, is likely to shrink (see dotted line), and it is held in place only by the friction of the nails.

The extended bottom, Fig.

284, B, overcomes the objection to shrinkage and adds a decorative feature.

The bottom may be set in, Fig.